Home / 20,398.30-30,593.76-12,980.71

Finding the Fourth Proportional to 20,398.30, 30,593.76 and 12,980.71

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Solution

The fourth proportional to 20,398.30, 30,593.76 and 12,980.71 is: 19,468.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,398.30 : 30,593.76 = 12,980.71 : x
  2. Step 2: Convert to fraction form
    20,398.30/30,593.76 = 12,980.71/x
  3. Step 3: Cross multiply
    20,398.30x = 30,593.76 × 12,980.71
  4. Step 4: Simplify right side
    20,398.30x = 397,128,726.37
  5. Step 5: Solve for x
    x = 397,128,726.37/20,398.30
  6. Step 6: Final answer
    x = 19,468.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.