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Finding the Fourth Proportional to 28,680, 39,561.24 and 18,051.18

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Solution

The fourth proportional to 28,680, 39,561.24 and 18,051.18 is: 24,899.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,680 : 39,561.24 = 18,051.18 : x
  2. Step 2: Convert to fraction form
    28,680/39,561.24 = 18,051.18/x
  3. Step 3: Cross multiply
    28,680x = 39,561.24 × 18,051.18
  4. Step 4: Simplify right side
    28,680x = 714,127,064.26
  5. Step 5: Solve for x
    x = 714,127,064.26/28,680
  6. Step 6: Final answer
    x = 24,899.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.