Home / 10,887.70-15,026.55-7,872.61

Finding the Fourth Proportional to 10,887.70, 15,026.55 and 7,872.61

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Solution

The fourth proportional to 10,887.70, 15,026.55 and 7,872.61 is: 10,865.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,887.70 : 15,026.55 = 7,872.61 : x
  2. Step 2: Convert to fraction form
    10,887.70/15,026.55 = 7,872.61/x
  3. Step 3: Cross multiply
    10,887.70x = 15,026.55 × 7,872.61
  4. Step 4: Simplify right side
    10,887.70x = 118,298,167.80
  5. Step 5: Solve for x
    x = 118,298,167.80/10,887.70
  6. Step 6: Final answer
    x = 10,865.30

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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.