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Finding the Fourth Proportional to 20,437.60, 30,656.40 and 10,579.90

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Solution

The fourth proportional to 20,437.60, 30,656.40 and 10,579.90 is: 15,869.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,437.60 : 30,656.40 = 10,579.90 : x
  2. Step 2: Convert to fraction form
    20,437.60/30,656.40 = 10,579.90/x
  3. Step 3: Cross multiply
    20,437.60x = 30,656.40 × 10,579.90
  4. Step 4: Simplify right side
    20,437.60x = 324,341,646.36
  5. Step 5: Solve for x
    x = 324,341,646.36/20,437.60
  6. Step 6: Final answer
    x = 15,869.85

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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.