Home / 21,358.08-31,872.29-18,766.35

Finding the Fourth Proportional to 21,358.08, 31,872.29 and 18,766.35

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Solution

The fourth proportional to 21,358.08, 31,872.29 and 18,766.35 is: 28,004.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,358.08 : 31,872.29 = 18,766.35 : x
  2. Step 2: Convert to fraction form
    21,358.08/31,872.29 = 18,766.35/x
  3. Step 3: Cross multiply
    21,358.08x = 31,872.29 × 18,766.35
  4. Step 4: Simplify right side
    21,358.08x = 598,126,455.61
  5. Step 5: Solve for x
    x = 598,126,455.61/21,358.08
  6. Step 6: Final answer
    x = 28,004.69

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.