Home / 20,330.85-28,066.10-15,296.95

Finding the Fourth Proportional to 20,330.85, 28,066.10 and 15,296.95

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Solution

The fourth proportional to 20,330.85, 28,066.10 and 15,296.95 is: 21,116.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,330.85 : 28,066.10 = 15,296.95 : x
  2. Step 2: Convert to fraction form
    20,330.85/28,066.10 = 15,296.95/x
  3. Step 3: Cross multiply
    20,330.85x = 28,066.10 × 15,296.95
  4. Step 4: Simplify right side
    20,330.85x = 429,325,686.99
  5. Step 5: Solve for x
    x = 429,325,686.99/20,330.85
  6. Step 6: Final answer
    x = 21,116.96

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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.