Home / 20,854.27-31,281.51-5,271.91

Finding the Fourth Proportional to 20,854.27, 31,281.51 and 5,271.91

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Solution

The fourth proportional to 20,854.27, 31,281.51 and 5,271.91 is: 7,907.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.27 : 31,281.51 = 5,271.91 : x
  2. Step 2: Convert to fraction form
    20,854.27/31,281.51 = 5,271.91/x
  3. Step 3: Cross multiply
    20,854.27x = 31,281.51 × 5,271.91
  4. Step 4: Simplify right side
    20,854.27x = 164,913,305.38
  5. Step 5: Solve for x
    x = 164,913,305.38/20,854.27
  6. Step 6: Final answer
    x = 7,907.89

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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.