Home / 23,130.42-31,920.11-12,520.05

Finding the Fourth Proportional to 23,130.42, 31,920.11 and 12,520.05

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Solution

The fourth proportional to 23,130.42, 31,920.11 and 12,520.05 is: 17,277.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,130.42 : 31,920.11 = 12,520.05 : x
  2. Step 2: Convert to fraction form
    23,130.42/31,920.11 = 12,520.05/x
  3. Step 3: Cross multiply
    23,130.42x = 31,920.11 × 12,520.05
  4. Step 4: Simplify right side
    23,130.42x = 399,641,310.61
  5. Step 5: Solve for x
    x = 399,641,310.61/23,130.42
  6. Step 6: Final answer
    x = 17,277.74

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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.