Home / 21,079.58-31,620.68-7,040.86

Finding the Fourth Proportional to 21,079.58, 31,620.68 and 7,040.86

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Solution

The fourth proportional to 21,079.58, 31,620.68 and 7,040.86 is: 10,561.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,079.58 : 31,620.68 = 7,040.86 : x
  2. Step 2: Convert to fraction form
    21,079.58/31,620.68 = 7,040.86/x
  3. Step 3: Cross multiply
    21,079.58x = 31,620.68 × 7,040.86
  4. Step 4: Simplify right side
    21,079.58x = 222,636,693.13
  5. Step 5: Solve for x
    x = 222,636,693.13/21,079.58
  6. Step 6: Final answer
    x = 10,561.73

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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.