Home / 15,517.60-21,410.55-9,144.45

Finding the Fourth Proportional to 15,517.60, 21,410.55 and 9,144.45

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Solution

The fourth proportional to 15,517.60, 21,410.55 and 9,144.45 is: 12,617.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,517.60 : 21,410.55 = 9,144.45 : x
  2. Step 2: Convert to fraction form
    15,517.60/21,410.55 = 9,144.45/x
  3. Step 3: Cross multiply
    15,517.60x = 21,410.55 × 9,144.45
  4. Step 4: Simplify right side
    15,517.60x = 195,787,551.17
  5. Step 5: Solve for x
    x = 195,787,551.17/15,517.60
  6. Step 6: Final answer
    x = 12,617.13

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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.