Home / 21,871-32,811.70-7,079.91

Finding the Fourth Proportional to 21,871, 32,811.70 and 7,079.91

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Solution

The fourth proportional to 21,871, 32,811.70 and 7,079.91 is: 10,621.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,871 : 32,811.70 = 7,079.91 : x
  2. Step 2: Convert to fraction form
    21,871/32,811.70 = 7,079.91/x
  3. Step 3: Cross multiply
    21,871x = 32,811.70 × 7,079.91
  4. Step 4: Simplify right side
    21,871x = 232,303,882.95
  5. Step 5: Solve for x
    x = 232,303,882.95/21,871
  6. Step 6: Final answer
    x = 10,621.55

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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.