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Finding the Fourth Proportional to 28,053.86, 42,051.25 and 9,328.87

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Solution

The fourth proportional to 28,053.86, 42,051.25 and 9,328.87 is: 13,983.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,053.86 : 42,051.25 = 9,328.87 : x
  2. Step 2: Convert to fraction form
    28,053.86/42,051.25 = 9,328.87/x
  3. Step 3: Cross multiply
    28,053.86x = 42,051.25 × 9,328.87
  4. Step 4: Simplify right side
    28,053.86x = 392,290,387.69
  5. Step 5: Solve for x
    x = 392,290,387.69/28,053.86
  6. Step 6: Final answer
    x = 13,983.47

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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.