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Finding the Fourth Proportional to 8,763.40, 13,126.38 and 8,155.72

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Solution

The fourth proportional to 8,763.40, 13,126.38 and 8,155.72 is: 12,216.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,763.40 : 13,126.38 = 8,155.72 : x
  2. Step 2: Convert to fraction form
    8,763.40/13,126.38 = 8,155.72/x
  3. Step 3: Cross multiply
    8,763.40x = 13,126.38 × 8,155.72
  4. Step 4: Simplify right side
    8,763.40x = 107,055,079.89
  5. Step 5: Solve for x
    x = 107,055,079.89/8,763.40
  6. Step 6: Final answer
    x = 12,216.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.