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Finding the Fourth Proportional to 28,359.99, 42,540 and 11,701.72

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Solution

The fourth proportional to 28,359.99, 42,540 and 11,701.72 is: 17,552.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,359.99 : 42,540 = 11,701.72 : x
  2. Step 2: Convert to fraction form
    28,359.99/42,540 = 11,701.72/x
  3. Step 3: Cross multiply
    28,359.99x = 42,540 × 11,701.72
  4. Step 4: Simplify right side
    28,359.99x = 497,791,168.80
  5. Step 5: Solve for x
    x = 497,791,168.80/28,359.99
  6. Step 6: Final answer
    x = 17,552.59

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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.