Home / 11,167.20-15,408.70-7,187.40

Finding the Fourth Proportional to 11,167.20, 15,408.70 and 7,187.40

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Solution

The fourth proportional to 11,167.20, 15,408.70 and 7,187.40 is: 9,917.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,167.20 : 15,408.70 = 7,187.40 : x
  2. Step 2: Convert to fraction form
    11,167.20/15,408.70 = 7,187.40/x
  3. Step 3: Cross multiply
    11,167.20x = 15,408.70 × 7,187.40
  4. Step 4: Simplify right side
    11,167.20x = 110,748,490.38
  5. Step 5: Solve for x
    x = 110,748,490.38/11,167.20
  6. Step 6: Final answer
    x = 9,917.30

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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.