Home / 20,390.08-28,136.28-12,434.26

Finding the Fourth Proportional to 20,390.08, 28,136.28 and 12,434.26

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Solution

The fourth proportional to 20,390.08, 28,136.28 and 12,434.26 is: 17,158.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,390.08 : 28,136.28 = 12,434.26 : x
  2. Step 2: Convert to fraction form
    20,390.08/28,136.28 = 12,434.26/x
  3. Step 3: Cross multiply
    20,390.08x = 28,136.28 × 12,434.26
  4. Step 4: Simplify right side
    20,390.08x = 349,853,820.95
  5. Step 5: Solve for x
    x = 349,853,820.95/20,390.08
  6. Step 6: Final answer
    x = 17,158.04

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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.