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Finding the Fourth Proportional to 21,143, 29,099.66 and 18,124.94

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Solution

The fourth proportional to 21,143, 29,099.66 and 18,124.94 is: 24,945.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143 : 29,099.66 = 18,124.94 : x
  2. Step 2: Convert to fraction form
    21,143/29,099.66 = 18,124.94/x
  3. Step 3: Cross multiply
    21,143x = 29,099.66 × 18,124.94
  4. Step 4: Simplify right side
    21,143x = 527,429,591.52
  5. Step 5: Solve for x
    x = 527,429,591.52/21,143
  6. Step 6: Final answer
    x = 24,945.83

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1.5x scale

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.