Home / 20,916.90-31,379.24-6,877.71

Finding the Fourth Proportional to 20,916.90, 31,379.24 and 6,877.71

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Solution

The fourth proportional to 20,916.90, 31,379.24 and 6,877.71 is: 10,317.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916.90 : 31,379.24 = 6,877.71 : x
  2. Step 2: Convert to fraction form
    20,916.90/31,379.24 = 6,877.71/x
  3. Step 3: Cross multiply
    20,916.90x = 31,379.24 × 6,877.71
  4. Step 4: Simplify right side
    20,916.90x = 215,817,312.74
  5. Step 5: Solve for x
    x = 215,817,312.74/20,916.90
  6. Step 6: Final answer
    x = 10,317.84

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1.5x scale

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.