Home / 20,603.68-28,422.12-12,539.80

Finding the Fourth Proportional to 20,603.68, 28,422.12 and 12,539.80

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Solution

The fourth proportional to 20,603.68, 28,422.12 and 12,539.80 is: 17,298.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.68 : 28,422.12 = 12,539.80 : x
  2. Step 2: Convert to fraction form
    20,603.68/28,422.12 = 12,539.80/x
  3. Step 3: Cross multiply
    20,603.68x = 28,422.12 × 12,539.80
  4. Step 4: Simplify right side
    20,603.68x = 356,407,700.38
  5. Step 5: Solve for x
    x = 356,407,700.38/20,603.68
  6. Step 6: Final answer
    x = 17,298.25

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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.