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Finding the Fourth Proportional to 37,479, 51,721.17 and 20,712

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Solution

The fourth proportional to 37,479, 51,721.17 and 20,712 is: 28,582.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,479 : 51,721.17 = 20,712 : x
  2. Step 2: Convert to fraction form
    37,479/51,721.17 = 20,712/x
  3. Step 3: Cross multiply
    37,479x = 51,721.17 × 20,712
  4. Step 4: Simplify right side
    37,479x = 1,071,248,873.04
  5. Step 5: Solve for x
    x = 1,071,248,873.04/37,479
  6. Step 6: Final answer
    x = 28,582.64

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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.