Home / 20,487.15-28,265.27-12,423.33

Finding the Fourth Proportional to 20,487.15, 28,265.27 and 12,423.33

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Solution

The fourth proportional to 20,487.15, 28,265.27 and 12,423.33 is: 17,139.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.15 : 28,265.27 = 12,423.33 : x
  2. Step 2: Convert to fraction form
    20,487.15/28,265.27 = 12,423.33/x
  3. Step 3: Cross multiply
    20,487.15x = 28,265.27 × 12,423.33
  4. Step 4: Simplify right side
    20,487.15x = 351,148,714.63
  5. Step 5: Solve for x
    x = 351,148,714.63/20,487.15
  6. Step 6: Final answer
    x = 17,139.95

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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.