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Finding the Fourth Proportional to 31,907.60, 47,864.03 and 9,721.16

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Solution

The fourth proportional to 31,907.60, 47,864.03 and 9,721.16 is: 14,582.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,907.60 : 47,864.03 = 9,721.16 : x
  2. Step 2: Convert to fraction form
    31,907.60/47,864.03 = 9,721.16/x
  3. Step 3: Cross multiply
    31,907.60x = 47,864.03 × 9,721.16
  4. Step 4: Simplify right side
    31,907.60x = 465,293,605.95
  5. Step 5: Solve for x
    x = 465,293,605.95/31,907.60
  6. Step 6: Final answer
    x = 14,582.53

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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.