Home / 20,862.23-31,283.98-12,432.71

Finding the Fourth Proportional to 20,862.23, 31,283.98 and 12,432.71

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Solution

The fourth proportional to 20,862.23, 31,283.98 and 12,432.71 is: 18,643.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.23 : 31,283.98 = 12,432.71 : x
  2. Step 2: Convert to fraction form
    20,862.23/31,283.98 = 12,432.71/x
  3. Step 3: Cross multiply
    20,862.23x = 31,283.98 × 12,432.71
  4. Step 4: Simplify right side
    20,862.23x = 388,944,650.99
  5. Step 5: Solve for x
    x = 388,944,650.99/20,862.23
  6. Step 6: Final answer
    x = 18,643.48

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1.5x scale

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.