Home / 15,355.66-21,189.30-8,641.12

Finding the Fourth Proportional to 15,355.66, 21,189.30 and 8,641.12

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Solution

The fourth proportional to 15,355.66, 21,189.30 and 8,641.12 is: 11,923.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,355.66 : 21,189.30 = 8,641.12 : x
  2. Step 2: Convert to fraction form
    15,355.66/21,189.30 = 8,641.12/x
  3. Step 3: Cross multiply
    15,355.66x = 21,189.30 × 8,641.12
  4. Step 4: Simplify right side
    15,355.66x = 183,099,284.02
  5. Step 5: Solve for x
    x = 183,099,284.02/15,355.66
  6. Step 6: Final answer
    x = 11,923.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.