Home / 20,866.86-31,300.29-5,284.08

Finding the Fourth Proportional to 20,866.86, 31,300.29 and 5,284.08

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Solution

The fourth proportional to 20,866.86, 31,300.29 and 5,284.08 is: 7,926.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.86 : 31,300.29 = 5,284.08 : x
  2. Step 2: Convert to fraction form
    20,866.86/31,300.29 = 5,284.08/x
  3. Step 3: Cross multiply
    20,866.86x = 31,300.29 × 5,284.08
  4. Step 4: Simplify right side
    20,866.86x = 165,393,236.38
  5. Step 5: Solve for x
    x = 165,393,236.38/20,866.86
  6. Step 6: Final answer
    x = 7,926.12

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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.