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Finding the Fourth Proportional to 19,888, 29,831.92 and 15,508.72

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Solution

The fourth proportional to 19,888, 29,831.92 and 15,508.72 is: 23,263.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,888 : 29,831.92 = 15,508.72 : x
  2. Step 2: Convert to fraction form
    19,888/29,831.92 = 15,508.72/x
  3. Step 3: Cross multiply
    19,888x = 29,831.92 × 15,508.72
  4. Step 4: Simplify right side
    19,888x = 462,654,894.34
  5. Step 5: Solve for x
    x = 462,654,894.34/19,888
  6. Step 6: Final answer
    x = 23,263.02

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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.