Home / 23,131.13-31,920.95-12,520.85

Finding the Fourth Proportional to 23,131.13, 31,920.95 and 12,520.85

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Solution

The fourth proportional to 23,131.13, 31,920.95 and 12,520.85 is: 17,278.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,131.13 : 31,920.95 = 12,520.85 : x
  2. Step 2: Convert to fraction form
    23,131.13/31,920.95 = 12,520.85/x
  3. Step 3: Cross multiply
    23,131.13x = 31,920.95 × 12,520.85
  4. Step 4: Simplify right side
    23,131.13x = 399,677,298.50
  5. Step 5: Solve for x
    x = 399,677,298.50/23,131.13
  6. Step 6: Final answer
    x = 17,278.77

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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.