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Finding the Fourth Proportional to 15,159.01, 20,911.92 and 10,129.98

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Solution

The fourth proportional to 15,159.01, 20,911.92 and 10,129.98 is: 13,974.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,159.01 : 20,911.92 = 10,129.98 : x
  2. Step 2: Convert to fraction form
    15,159.01/20,911.92 = 10,129.98/x
  3. Step 3: Cross multiply
    15,159.01x = 20,911.92 × 10,129.98
  4. Step 4: Simplify right side
    15,159.01x = 211,837,331.36
  5. Step 5: Solve for x
    x = 211,837,331.36/15,159.01
  6. Step 6: Final answer
    x = 13,974.35

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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.