Home / 13,440.02-18,547.85-7,471.78

Finding the Fourth Proportional to 13,440.02, 18,547.85 and 7,471.78

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Solution

The fourth proportional to 13,440.02, 18,547.85 and 7,471.78 is: 10,311.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,440.02 : 18,547.85 = 7,471.78 : x
  2. Step 2: Convert to fraction form
    13,440.02/18,547.85 = 7,471.78/x
  3. Step 3: Cross multiply
    13,440.02x = 18,547.85 × 7,471.78
  4. Step 4: Simplify right side
    13,440.02x = 138,585,361.93
  5. Step 5: Solve for x
    x = 138,585,361.93/13,440.02
  6. Step 6: Final answer
    x = 10,311.40

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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.