Home / 20,320.86-28,034.55-12,356.70

Finding the Fourth Proportional to 20,320.86, 28,034.55 and 12,356.70

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Solution

The fourth proportional to 20,320.86, 28,034.55 and 12,356.70 is: 17,047.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.86 : 28,034.55 = 12,356.70 : x
  2. Step 2: Convert to fraction form
    20,320.86/28,034.55 = 12,356.70/x
  3. Step 3: Cross multiply
    20,320.86x = 28,034.55 × 12,356.70
  4. Step 4: Simplify right side
    20,320.86x = 346,414,523.99
  5. Step 5: Solve for x
    x = 346,414,523.99/20,320.86
  6. Step 6: Final answer
    x = 17,047.24

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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.