Home / 20,715.10-31,072.66-5,132.74

Finding the Fourth Proportional to 20,715.10, 31,072.66 and 5,132.74

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Solution

The fourth proportional to 20,715.10, 31,072.66 and 5,132.74 is: 7,699.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.10 : 31,072.66 = 5,132.74 : x
  2. Step 2: Convert to fraction form
    20,715.10/31,072.66 = 5,132.74/x
  3. Step 3: Cross multiply
    20,715.10x = 31,072.66 × 5,132.74
  4. Step 4: Simplify right side
    20,715.10x = 159,487,884.89
  5. Step 5: Solve for x
    x = 159,487,884.89/20,715.10
  6. Step 6: Final answer
    x = 7,699.11

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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.