Home / 20,585.59-28,390.30-13,412.79

Finding the Fourth Proportional to 20,585.59, 28,390.30 and 13,412.79

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Solution

The fourth proportional to 20,585.59, 28,390.30 and 13,412.79 is: 18,498.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.59 : 28,390.30 = 13,412.79 : x
  2. Step 2: Convert to fraction form
    20,585.59/28,390.30 = 13,412.79/x
  3. Step 3: Cross multiply
    20,585.59x = 28,390.30 × 13,412.79
  4. Step 4: Simplify right side
    20,585.59x = 380,793,098.41
  5. Step 5: Solve for x
    x = 380,793,098.41/20,585.59
  6. Step 6: Final answer
    x = 18,498.04

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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.