Home / 20,874.98-31,312.95-12,561.95

Finding the Fourth Proportional to 20,874.98, 31,312.95 and 12,561.95

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Solution

The fourth proportional to 20,874.98, 31,312.95 and 12,561.95 is: 18,843.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,874.98 : 31,312.95 = 12,561.95 : x
  2. Step 2: Convert to fraction form
    20,874.98/31,312.95 = 12,561.95/x
  3. Step 3: Cross multiply
    20,874.98x = 31,312.95 × 12,561.95
  4. Step 4: Simplify right side
    20,874.98x = 393,351,743.43
  5. Step 5: Solve for x
    x = 393,351,743.43/20,874.98
  6. Step 6: Final answer
    x = 18,843.21

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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.