Home / 11,587.20-15,998.40-7,339.20

Finding the Fourth Proportional to 11,587.20, 15,998.40 and 7,339.20

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Solution

The fourth proportional to 11,587.20, 15,998.40 and 7,339.20 is: 10,133.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,587.20 : 15,998.40 = 7,339.20 : x
  2. Step 2: Convert to fraction form
    11,587.20/15,998.40 = 7,339.20/x
  3. Step 3: Cross multiply
    11,587.20x = 15,998.40 × 7,339.20
  4. Step 4: Simplify right side
    11,587.20x = 117,415,457.28
  5. Step 5: Solve for x
    x = 117,415,457.28/11,587.20
  6. Step 6: Final answer
    x = 10,133.20

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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.