Home / 21,025.28-31,500.80-18,737.12

Finding the Fourth Proportional to 21,025.28, 31,500.80 and 18,737.12

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Solution

The fourth proportional to 21,025.28, 31,500.80 and 18,737.12 is: 28,072.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,025.28 : 31,500.80 = 18,737.12 : x
  2. Step 2: Convert to fraction form
    21,025.28/31,500.80 = 18,737.12/x
  3. Step 3: Cross multiply
    21,025.28x = 31,500.80 × 18,737.12
  4. Step 4: Simplify right side
    21,025.28x = 590,234,269.70
  5. Step 5: Solve for x
    x = 590,234,269.70/21,025.28
  6. Step 6: Final answer
    x = 28,072.60

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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.