Home / 20,881.81-31,266.21-15,292.81

Finding the Fourth Proportional to 20,881.81, 31,266.21 and 15,292.81

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Solution

The fourth proportional to 20,881.81, 31,266.21 and 15,292.81 is: 22,897.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.81 : 31,266.21 = 15,292.81 : x
  2. Step 2: Convert to fraction form
    20,881.81/31,266.21 = 15,292.81/x
  3. Step 3: Cross multiply
    20,881.81x = 31,266.21 × 15,292.81
  4. Step 4: Simplify right side
    20,881.81x = 478,148,052.62
  5. Step 5: Solve for x
    x = 478,148,052.62/20,881.81
  6. Step 6: Final answer
    x = 22,897.83

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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.