Home / 20,981.10-31,471.65-20,174.70

Finding the Fourth Proportional to 20,981.10, 31,471.65 and 20,174.70

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Solution

The fourth proportional to 20,981.10, 31,471.65 and 20,174.70 is: 30,262.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.10 : 31,471.65 = 20,174.70 : x
  2. Step 2: Convert to fraction form
    20,981.10/31,471.65 = 20,174.70/x
  3. Step 3: Cross multiply
    20,981.10x = 31,471.65 × 20,174.70
  4. Step 4: Simplify right side
    20,981.10x = 634,931,097.26
  5. Step 5: Solve for x
    x = 634,931,097.26/20,981.10
  6. Step 6: Final answer
    x = 30,262.05

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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.