Home / 20,916.23-31,374.14-5,121.33

Finding the Fourth Proportional to 20,916.23, 31,374.14 and 5,121.33

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Solution

The fourth proportional to 20,916.23, 31,374.14 and 5,121.33 is: 7,681.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916.23 : 31,374.14 = 5,121.33 : x
  2. Step 2: Convert to fraction form
    20,916.23/31,374.14 = 5,121.33/x
  3. Step 3: Cross multiply
    20,916.23x = 31,374.14 × 5,121.33
  4. Step 4: Simplify right side
    20,916.23x = 160,677,298.80
  5. Step 5: Solve for x
    x = 160,677,298.80/20,916.23
  6. Step 6: Final answer
    x = 7,681.95

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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.