Home / 20,937.83-28,896.69-11,988.20

Finding the Fourth Proportional to 20,937.83, 28,896.69 and 11,988.20

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Solution

The fourth proportional to 20,937.83, 28,896.69 and 11,988.20 is: 16,545.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,937.83 : 28,896.69 = 11,988.20 : x
  2. Step 2: Convert to fraction form
    20,937.83/28,896.69 = 11,988.20/x
  3. Step 3: Cross multiply
    20,937.83x = 28,896.69 × 11,988.20
  4. Step 4: Simplify right side
    20,937.83x = 346,419,416.26
  5. Step 5: Solve for x
    x = 346,419,416.26/20,937.83
  6. Step 6: Final answer
    x = 16,545.15

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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.