Home / 20,560.15-28,376.22-15,530.05

Finding the Fourth Proportional to 20,560.15, 28,376.22 and 15,530.05

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Solution

The fourth proportional to 20,560.15, 28,376.22 and 15,530.05 is: 21,433.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,560.15 : 28,376.22 = 15,530.05 : x
  2. Step 2: Convert to fraction form
    20,560.15/28,376.22 = 15,530.05/x
  3. Step 3: Cross multiply
    20,560.15x = 28,376.22 × 15,530.05
  4. Step 4: Simplify right side
    20,560.15x = 440,684,115.41
  5. Step 5: Solve for x
    x = 440,684,115.41/20,560.15
  6. Step 6: Final answer
    x = 21,433.90

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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.