Home / 15,353.11-21,187.70-8,638.98

Finding the Fourth Proportional to 15,353.11, 21,187.70 and 8,638.98

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Solution

The fourth proportional to 15,353.11, 21,187.70 and 8,638.98 is: 11,922.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,353.11 : 21,187.70 = 8,638.98 : x
  2. Step 2: Convert to fraction form
    15,353.11/21,187.70 = 8,638.98/x
  3. Step 3: Cross multiply
    15,353.11x = 21,187.70 × 8,638.98
  4. Step 4: Simplify right side
    15,353.11x = 183,040,010.61
  5. Step 5: Solve for x
    x = 183,040,010.61/15,353.11
  6. Step 6: Final answer
    x = 11,922.02

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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.