Home / 42,569.92-63,865.22-12,988.28

Finding the Fourth Proportional to 42,569.92, 63,865.22 and 12,988.28

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Solution

The fourth proportional to 42,569.92, 63,865.22 and 12,988.28 is: 19,485.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,569.92 : 63,865.22 = 12,988.28 : x
  2. Step 2: Convert to fraction form
    42,569.92/63,865.22 = 12,988.28/x
  3. Step 3: Cross multiply
    42,569.92x = 63,865.22 × 12,988.28
  4. Step 4: Simplify right side
    42,569.92x = 829,499,359.62
  5. Step 5: Solve for x
    x = 829,499,359.62/42,569.92
  6. Step 6: Final answer
    x = 19,485.57

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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.