Home / 13,146.66-18,148.77-8,438.94

Finding the Fourth Proportional to 13,146.66, 18,148.77 and 8,438.94

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Solution

The fourth proportional to 13,146.66, 18,148.77 and 8,438.94 is: 11,649.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,146.66 : 18,148.77 = 8,438.94 : x
  2. Step 2: Convert to fraction form
    13,146.66/18,148.77 = 8,438.94/x
  3. Step 3: Cross multiply
    13,146.66x = 18,148.77 × 8,438.94
  4. Step 4: Simplify right side
    13,146.66x = 153,156,381.10
  5. Step 5: Solve for x
    x = 153,156,381.10/13,146.66
  6. Step 6: Final answer
    x = 11,649.83

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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.