Home / 20,859.13-31,288.56-5,276.80

Finding the Fourth Proportional to 20,859.13, 31,288.56 and 5,276.80

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Solution

The fourth proportional to 20,859.13, 31,288.56 and 5,276.80 is: 7,915.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859.13 : 31,288.56 = 5,276.80 : x
  2. Step 2: Convert to fraction form
    20,859.13/31,288.56 = 5,276.80/x
  3. Step 3: Cross multiply
    20,859.13x = 31,288.56 × 5,276.80
  4. Step 4: Simplify right side
    20,859.13x = 165,103,473.41
  5. Step 5: Solve for x
    x = 165,103,473.41/20,859.13
  6. Step 6: Final answer
    x = 7,915.17

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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.