Home / 8,638.29-11,931.59-6,672.69

Finding the Fourth Proportional to 8,638.29, 11,931.59 and 6,672.69

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Solution

The fourth proportional to 8,638.29, 11,931.59 and 6,672.69 is: 9,216.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.29 : 11,931.59 = 6,672.69 : x
  2. Step 2: Convert to fraction form
    8,638.29/11,931.59 = 6,672.69/x
  3. Step 3: Cross multiply
    8,638.29x = 11,931.59 × 6,672.69
  4. Step 4: Simplify right side
    8,638.29x = 79,615,767.91
  5. Step 5: Solve for x
    x = 79,615,767.91/8,638.29
  6. Step 6: Final answer
    x = 9,216.61

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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.