Home / 20,691.49-31,037.31-13,715.81

Finding the Fourth Proportional to 20,691.49, 31,037.31 and 13,715.81

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Solution

The fourth proportional to 20,691.49, 31,037.31 and 13,715.81 is: 20,573.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.49 : 31,037.31 = 13,715.81 : x
  2. Step 2: Convert to fraction form
    20,691.49/31,037.31 = 13,715.81/x
  3. Step 3: Cross multiply
    20,691.49x = 31,037.31 × 13,715.81
  4. Step 4: Simplify right side
    20,691.49x = 425,701,846.87
  5. Step 5: Solve for x
    x = 425,701,846.87/20,691.49
  6. Step 6: Final answer
    x = 20,573.76

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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.