Home / 13,943.40-20,915.10-9,788.10

Finding the Fourth Proportional to 13,943.40, 20,915.10 and 9,788.10

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Solution

The fourth proportional to 13,943.40, 20,915.10 and 9,788.10 is: 14,682.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,943.40 : 20,915.10 = 9,788.10 : x
  2. Step 2: Convert to fraction form
    13,943.40/20,915.10 = 9,788.10/x
  3. Step 3: Cross multiply
    13,943.40x = 20,915.10 × 9,788.10
  4. Step 4: Simplify right side
    13,943.40x = 204,719,090.31
  5. Step 5: Solve for x
    x = 204,719,090.31/13,943.40
  6. Step 6: Final answer
    x = 14,682.15

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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.