Home / 20,663.13-28,515.63-12,165.69

Finding the Fourth Proportional to 20,663.13, 28,515.63 and 12,165.69

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Solution

The fourth proportional to 20,663.13, 28,515.63 and 12,165.69 is: 16,788.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,663.13 : 28,515.63 = 12,165.69 : x
  2. Step 2: Convert to fraction form
    20,663.13/28,515.63 = 12,165.69/x
  3. Step 3: Cross multiply
    20,663.13x = 28,515.63 × 12,165.69
  4. Step 4: Simplify right side
    20,663.13x = 346,912,314.73
  5. Step 5: Solve for x
    x = 346,912,314.73/20,663.13
  6. Step 6: Final answer
    x = 16,788.95

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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.