Home / 20,585.72-28,408.30-11,154.28

Finding the Fourth Proportional to 20,585.72, 28,408.30 and 11,154.28

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Solution

The fourth proportional to 20,585.72, 28,408.30 and 11,154.28 is: 15,392.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.72 : 28,408.30 = 11,154.28 : x
  2. Step 2: Convert to fraction form
    20,585.72/28,408.30 = 11,154.28/x
  3. Step 3: Cross multiply
    20,585.72x = 28,408.30 × 11,154.28
  4. Step 4: Simplify right side
    20,585.72x = 316,874,132.52
  5. Step 5: Solve for x
    x = 316,874,132.52/20,585.72
  6. Step 6: Final answer
    x = 15,392.91

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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.