Home / 10,887.89-15,018.12-8,646.21

Finding the Fourth Proportional to 10,887.89, 15,018.12 and 8,646.21

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Solution

The fourth proportional to 10,887.89, 15,018.12 and 8,646.21 is: 11,926.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,887.89 : 15,018.12 = 8,646.21 : x
  2. Step 2: Convert to fraction form
    10,887.89/15,018.12 = 8,646.21/x
  3. Step 3: Cross multiply
    10,887.89x = 15,018.12 × 8,646.21
  4. Step 4: Simplify right side
    10,887.89x = 129,849,819.33
  5. Step 5: Solve for x
    x = 129,849,819.33/10,887.89
  6. Step 6: Final answer
    x = 11,926.08

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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.