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Finding the Fourth Proportional to 8,916.13, 13,315.64 and 7,163.79

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Solution

The fourth proportional to 8,916.13, 13,315.64 and 7,163.79 is: 10,698.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,916.13 : 13,315.64 = 7,163.79 : x
  2. Step 2: Convert to fraction form
    8,916.13/13,315.64 = 7,163.79/x
  3. Step 3: Cross multiply
    8,916.13x = 13,315.64 × 7,163.79
  4. Step 4: Simplify right side
    8,916.13x = 95,390,478.12
  5. Step 5: Solve for x
    x = 95,390,478.12/8,916.13
  6. Step 6: Final answer
    x = 10,698.65

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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.