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Finding the Fourth Proportional to 11,218.03, 15,478.15 and 7,644.76

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Solution

The fourth proportional to 11,218.03, 15,478.15 and 7,644.76 is: 10,547.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,218.03 : 15,478.15 = 7,644.76 : x
  2. Step 2: Convert to fraction form
    11,218.03/15,478.15 = 7,644.76/x
  3. Step 3: Cross multiply
    11,218.03x = 15,478.15 × 7,644.76
  4. Step 4: Simplify right side
    11,218.03x = 118,326,763.69
  5. Step 5: Solve for x
    x = 118,326,763.69/11,218.03
  6. Step 6: Final answer
    x = 10,547.91

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.