Home / 42,701.20-64,061.40-13,120.40

Finding the Fourth Proportional to 42,701.20, 64,061.40 and 13,120.40

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Solution

The fourth proportional to 42,701.20, 64,061.40 and 13,120.40 is: 19,683.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,701.20 : 64,061.40 = 13,120.40 : x
  2. Step 2: Convert to fraction form
    42,701.20/64,061.40 = 13,120.40/x
  3. Step 3: Cross multiply
    42,701.20x = 64,061.40 × 13,120.40
  4. Step 4: Simplify right side
    42,701.20x = 840,511,192.56
  5. Step 5: Solve for x
    x = 840,511,192.56/42,701.20
  6. Step 6: Final answer
    x = 19,683.55

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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.