Home / 23,130.92-31,920.64-12,520.54

Finding the Fourth Proportional to 23,130.92, 31,920.64 and 12,520.54

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Solution

The fourth proportional to 23,130.92, 31,920.64 and 12,520.54 is: 17,278.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,130.92 : 31,920.64 = 12,520.54 : x
  2. Step 2: Convert to fraction form
    23,130.92/31,920.64 = 12,520.54/x
  3. Step 3: Cross multiply
    23,130.92x = 31,920.64 × 12,520.54
  4. Step 4: Simplify right side
    23,130.92x = 399,663,649.95
  5. Step 5: Solve for x
    x = 399,663,649.95/23,130.92
  6. Step 6: Final answer
    x = 17,278.33

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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.