Home / 20,946.82-31,442.61-8,475

Finding the Fourth Proportional to 20,946.82, 31,442.61 and 8,475

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Solution

The fourth proportional to 20,946.82, 31,442.61 and 8,475 is: 12,721.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,946.82 : 31,442.61 = 8,475 : x
  2. Step 2: Convert to fraction form
    20,946.82/31,442.61 = 8,475/x
  3. Step 3: Cross multiply
    20,946.82x = 31,442.61 × 8,475
  4. Step 4: Simplify right side
    20,946.82x = 266,476,119.75
  5. Step 5: Solve for x
    x = 266,476,119.75/20,946.82
  6. Step 6: Final answer
    x = 12,721.55

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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.