Home / 20,737.40-31,106.10-18,145.40

Finding the Fourth Proportional to 20,737.40, 31,106.10 and 18,145.40

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Solution

The fourth proportional to 20,737.40, 31,106.10 and 18,145.40 is: 27,218.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,737.40 : 31,106.10 = 18,145.40 : x
  2. Step 2: Convert to fraction form
    20,737.40/31,106.10 = 18,145.40/x
  3. Step 3: Cross multiply
    20,737.40x = 31,106.10 × 18,145.40
  4. Step 4: Simplify right side
    20,737.40x = 564,432,626.94
  5. Step 5: Solve for x
    x = 564,432,626.94/20,737.40
  6. Step 6: Final answer
    x = 27,218.10

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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.