Home / 20,712.59-30,869.04-20,679.65

Finding the Fourth Proportional to 20,712.59, 30,869.04 and 20,679.65

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Solution

The fourth proportional to 20,712.59, 30,869.04 and 20,679.65 is: 30,819.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.59 : 30,869.04 = 20,679.65 : x
  2. Step 2: Convert to fraction form
    20,712.59/30,869.04 = 20,679.65/x
  3. Step 3: Cross multiply
    20,712.59x = 30,869.04 × 20,679.65
  4. Step 4: Simplify right side
    20,712.59x = 638,360,943.04
  5. Step 5: Solve for x
    x = 638,360,943.04/20,712.59
  6. Step 6: Final answer
    x = 30,819.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.