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Finding the Fourth Proportional to 8,773.76, 12,104.64 and 5,415.04

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Solution

The fourth proportional to 8,773.76, 12,104.64 and 5,415.04 is: 7,470.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,773.76 : 12,104.64 = 5,415.04 : x
  2. Step 2: Convert to fraction form
    8,773.76/12,104.64 = 5,415.04/x
  3. Step 3: Cross multiply
    8,773.76x = 12,104.64 × 5,415.04
  4. Step 4: Simplify right side
    8,773.76x = 65,547,109.79
  5. Step 5: Solve for x
    x = 65,547,109.79/8,773.76
  6. Step 6: Final answer
    x = 7,470.81

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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.