Home / 20,876.61-31,315.74-5,294.64

Finding the Fourth Proportional to 20,876.61, 31,315.74 and 5,294.64

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Solution

The fourth proportional to 20,876.61, 31,315.74 and 5,294.64 is: 7,942.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.61 : 31,315.74 = 5,294.64 : x
  2. Step 2: Convert to fraction form
    20,876.61/31,315.74 = 5,294.64/x
  3. Step 3: Cross multiply
    20,876.61x = 31,315.74 × 5,294.64
  4. Step 4: Simplify right side
    20,876.61x = 165,805,569.63
  5. Step 5: Solve for x
    x = 165,805,569.63/20,876.61
  6. Step 6: Final answer
    x = 7,942.17

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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.