Home / 20,650.39-28,488.24-12,689.71

Finding the Fourth Proportional to 20,650.39, 28,488.24 and 12,689.71

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Solution

The fourth proportional to 20,650.39, 28,488.24 and 12,689.71 is: 17,506.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,650.39 : 28,488.24 = 12,689.71 : x
  2. Step 2: Convert to fraction form
    20,650.39/28,488.24 = 12,689.71/x
  3. Step 3: Cross multiply
    20,650.39x = 28,488.24 × 12,689.71
  4. Step 4: Simplify right side
    20,650.39x = 361,507,432.79
  5. Step 5: Solve for x
    x = 361,507,432.79/20,650.39
  6. Step 6: Final answer
    x = 17,506.08

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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.