Home / 20,946.18-31,418.99-5,151.35

Finding the Fourth Proportional to 20,946.18, 31,418.99 and 5,151.35

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Solution

The fourth proportional to 20,946.18, 31,418.99 and 5,151.35 is: 7,726.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,946.18 : 31,418.99 = 5,151.35 : x
  2. Step 2: Convert to fraction form
    20,946.18/31,418.99 = 5,151.35/x
  3. Step 3: Cross multiply
    20,946.18x = 31,418.99 × 5,151.35
  4. Step 4: Simplify right side
    20,946.18x = 161,850,057.04
  5. Step 5: Solve for x
    x = 161,850,057.04/20,946.18
  6. Step 6: Final answer
    x = 7,726.95

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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.