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Finding the Fourth Proportional to 28,658.40, 42,890.40 and 25,159.20

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Solution

The fourth proportional to 28,658.40, 42,890.40 and 25,159.20 is: 37,653.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,658.40 : 42,890.40 = 25,159.20 : x
  2. Step 2: Convert to fraction form
    28,658.40/42,890.40 = 25,159.20/x
  3. Step 3: Cross multiply
    28,658.40x = 42,890.40 × 25,159.20
  4. Step 4: Simplify right side
    28,658.40x = 1,079,088,151.68
  5. Step 5: Solve for x
    x = 1,079,088,151.68/28,658.40
  6. Step 6: Final answer
    x = 37,653.47

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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.