Home / 15,025.40-20,737.50-9,989.72

Finding the Fourth Proportional to 15,025.40, 20,737.50 and 9,989.72

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Solution

The fourth proportional to 15,025.40, 20,737.50 and 9,989.72 is: 13,787.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,025.40 : 20,737.50 = 9,989.72 : x
  2. Step 2: Convert to fraction form
    15,025.40/20,737.50 = 9,989.72/x
  3. Step 3: Cross multiply
    15,025.40x = 20,737.50 × 9,989.72
  4. Step 4: Simplify right side
    15,025.40x = 207,161,818.50
  5. Step 5: Solve for x
    x = 207,161,818.50/15,025.40
  6. Step 6: Final answer
    x = 13,787.44

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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.