Home / 21,068.32-31,607.19-7,920.80

Finding the Fourth Proportional to 21,068.32, 31,607.19 and 7,920.80

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Solution

The fourth proportional to 21,068.32, 31,607.19 and 7,920.80 is: 11,882.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,068.32 : 31,607.19 = 7,920.80 : x
  2. Step 2: Convert to fraction form
    21,068.32/31,607.19 = 7,920.80/x
  3. Step 3: Cross multiply
    21,068.32x = 31,607.19 × 7,920.80
  4. Step 4: Simplify right side
    21,068.32x = 250,354,309.57
  5. Step 5: Solve for x
    x = 250,354,309.57/21,068.32
  6. Step 6: Final answer
    x = 11,882.98

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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.