Home / 7,430.10-11,145.15-6,278.10

Finding the Fourth Proportional to 7,430.10, 11,145.15 and 6,278.10

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Solution

The fourth proportional to 7,430.10, 11,145.15 and 6,278.10 is: 9,417.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,430.10 : 11,145.15 = 6,278.10 : x
  2. Step 2: Convert to fraction form
    7,430.10/11,145.15 = 6,278.10/x
  3. Step 3: Cross multiply
    7,430.10x = 11,145.15 × 6,278.10
  4. Step 4: Simplify right side
    7,430.10x = 69,970,366.22
  5. Step 5: Solve for x
    x = 69,970,366.22/7,430.10
  6. Step 6: Final answer
    x = 9,417.15

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.