Home / 20,586.13-28,408.85-11,154.69

Finding the Fourth Proportional to 20,586.13, 28,408.85 and 11,154.69

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Solution

The fourth proportional to 20,586.13, 28,408.85 and 11,154.69 is: 15,393.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,586.13 : 28,408.85 = 11,154.69 : x
  2. Step 2: Convert to fraction form
    20,586.13/28,408.85 = 11,154.69/x
  3. Step 3: Cross multiply
    20,586.13x = 28,408.85 × 11,154.69
  4. Step 4: Simplify right side
    20,586.13x = 316,891,915.01
  5. Step 5: Solve for x
    x = 316,891,915.01/20,586.13
  6. Step 6: Final answer
    x = 15,393.47

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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.