Home / 12,790.59-17,644.88-8,315.75

Finding the Fourth Proportional to 12,790.59, 17,644.88 and 8,315.75

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Solution

The fourth proportional to 12,790.59, 17,644.88 and 8,315.75 is: 11,471.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,790.59 : 17,644.88 = 8,315.75 : x
  2. Step 2: Convert to fraction form
    12,790.59/17,644.88 = 8,315.75/x
  3. Step 3: Cross multiply
    12,790.59x = 17,644.88 × 8,315.75
  4. Step 4: Simplify right side
    12,790.59x = 146,730,281.06
  5. Step 5: Solve for x
    x = 146,730,281.06/12,790.59
  6. Step 6: Final answer
    x = 11,471.74

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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.