Home / 15,123.66-20,859.02-13,423.92

Finding the Fourth Proportional to 15,123.66, 20,859.02 and 13,423.92

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Solution

The fourth proportional to 15,123.66, 20,859.02 and 13,423.92 is: 18,514.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,123.66 : 20,859.02 = 13,423.92 : x
  2. Step 2: Convert to fraction form
    15,123.66/20,859.02 = 13,423.92/x
  3. Step 3: Cross multiply
    15,123.66x = 20,859.02 × 13,423.92
  4. Step 4: Simplify right side
    15,123.66x = 280,009,815.76
  5. Step 5: Solve for x
    x = 280,009,815.76/15,123.66
  6. Step 6: Final answer
    x = 18,514.69

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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.