Home / 11,920.12-16,449.90-6,615.10

Finding the Fourth Proportional to 11,920.12, 16,449.90 and 6,615.10

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Solution

The fourth proportional to 11,920.12, 16,449.90 and 6,615.10 is: 9,128.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,920.12 : 16,449.90 = 6,615.10 : x
  2. Step 2: Convert to fraction form
    11,920.12/16,449.90 = 6,615.10/x
  3. Step 3: Cross multiply
    11,920.12x = 16,449.90 × 6,615.10
  4. Step 4: Simplify right side
    11,920.12x = 108,817,733.49
  5. Step 5: Solve for x
    x = 108,817,733.49/11,920.12
  6. Step 6: Final answer
    x = 9,128.91

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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.