Home / 21,543.71-32,315.33-8,405.30

Finding the Fourth Proportional to 21,543.71, 32,315.33 and 8,405.30

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Solution

The fourth proportional to 21,543.71, 32,315.33 and 8,405.30 is: 12,607.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,543.71 : 32,315.33 = 8,405.30 : x
  2. Step 2: Convert to fraction form
    21,543.71/32,315.33 = 8,405.30/x
  3. Step 3: Cross multiply
    21,543.71x = 32,315.33 × 8,405.30
  4. Step 4: Simplify right side
    21,543.71x = 271,619,839.65
  5. Step 5: Solve for x
    x = 271,619,839.65/21,543.71
  6. Step 6: Final answer
    x = 12,607.85

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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.