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Finding the Fourth Proportional to 39,898.47, 55,060.03 and 21,749.10

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Solution

The fourth proportional to 39,898.47, 55,060.03 and 21,749.10 is: 30,013.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,898.47 : 55,060.03 = 21,749.10 : x
  2. Step 2: Convert to fraction form
    39,898.47/55,060.03 = 21,749.10/x
  3. Step 3: Cross multiply
    39,898.47x = 55,060.03 × 21,749.10
  4. Step 4: Simplify right side
    39,898.47x = 1,197,506,098.47
  5. Step 5: Solve for x
    x = 1,197,506,098.47/39,898.47
  6. Step 6: Final answer
    x = 30,013.84

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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.