Home / 20,666.64-31,039.80-17,711.76

Finding the Fourth Proportional to 20,666.64, 31,039.80 and 17,711.76

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Solution

The fourth proportional to 20,666.64, 31,039.80 and 17,711.76 is: 26,601.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.64 : 31,039.80 = 17,711.76 : x
  2. Step 2: Convert to fraction form
    20,666.64/31,039.80 = 17,711.76/x
  3. Step 3: Cross multiply
    20,666.64x = 31,039.80 × 17,711.76
  4. Step 4: Simplify right side
    20,666.64x = 549,769,488.05
  5. Step 5: Solve for x
    x = 549,769,488.05/20,666.64
  6. Step 6: Final answer
    x = 26,601.78

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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.