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Finding the Fourth Proportional to 8,659.41, 12,916.19 and 7,256.49

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Solution

The fourth proportional to 8,659.41, 12,916.19 and 7,256.49 is: 10,823.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,659.41 : 12,916.19 = 7,256.49 : x
  2. Step 2: Convert to fraction form
    8,659.41/12,916.19 = 7,256.49/x
  3. Step 3: Cross multiply
    8,659.41x = 12,916.19 × 7,256.49
  4. Step 4: Simplify right side
    8,659.41x = 93,726,167.29
  5. Step 5: Solve for x
    x = 93,726,167.29/8,659.41
  6. Step 6: Final answer
    x = 10,823.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.