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Finding the Fourth Proportional to 42,513.59, 63,795.03 and 21,455.28

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Solution

The fourth proportional to 42,513.59, 63,795.03 and 21,455.28 is: 32,195.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,513.59 : 63,795.03 = 21,455.28 : x
  2. Step 2: Convert to fraction form
    42,513.59/63,795.03 = 21,455.28/x
  3. Step 3: Cross multiply
    42,513.59x = 63,795.03 × 21,455.28
  4. Step 4: Simplify right side
    42,513.59x = 1,368,740,271.49
  5. Step 5: Solve for x
    x = 1,368,740,271.49/42,513.59
  6. Step 6: Final answer
    x = 32,195.36

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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.