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Finding the Fourth Proportional to 42,528, 63,805.44 and 19,156.48

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Solution

The fourth proportional to 42,528, 63,805.44 and 19,156.48 is: 28,740.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,528 : 63,805.44 = 19,156.48 : x
  2. Step 2: Convert to fraction form
    42,528/63,805.44 = 19,156.48/x
  3. Step 3: Cross multiply
    42,528x = 63,805.44 × 19,156.48
  4. Step 4: Simplify right side
    42,528x = 1,222,287,635.25
  5. Step 5: Solve for x
    x = 1,222,287,635.25/42,528
  6. Step 6: Final answer
    x = 28,740.77

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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.