Home / 11,931.45-16,459.76-7,149.11

Finding the Fourth Proportional to 11,931.45, 16,459.76 and 7,149.11

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Solution

The fourth proportional to 11,931.45, 16,459.76 and 7,149.11 is: 9,862.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,931.45 : 16,459.76 = 7,149.11 : x
  2. Step 2: Convert to fraction form
    11,931.45/16,459.76 = 7,149.11/x
  3. Step 3: Cross multiply
    11,931.45x = 16,459.76 × 7,149.11
  4. Step 4: Simplify right side
    11,931.45x = 117,672,622.76
  5. Step 5: Solve for x
    x = 117,672,622.76/11,931.45
  6. Step 6: Final answer
    x = 9,862.39

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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.