Home / 42,242.57-63,355.79-12,660.40

Finding the Fourth Proportional to 42,242.57, 63,355.79 and 12,660.40

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Solution

The fourth proportional to 42,242.57, 63,355.79 and 12,660.40 is: 18,988.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,242.57 : 63,355.79 = 12,660.40 : x
  2. Step 2: Convert to fraction form
    42,242.57/63,355.79 = 12,660.40/x
  3. Step 3: Cross multiply
    42,242.57x = 63,355.79 × 12,660.40
  4. Step 4: Simplify right side
    42,242.57x = 802,109,683.35
  5. Step 5: Solve for x
    x = 802,109,683.35/42,242.57
  6. Step 6: Final answer
    x = 18,988.18

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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.