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Finding the Fourth Proportional to 8,860.80, 13,292.40 and 3,312.80

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Solution

The fourth proportional to 8,860.80, 13,292.40 and 3,312.80 is: 4,969.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,860.80 : 13,292.40 = 3,312.80 : x
  2. Step 2: Convert to fraction form
    8,860.80/13,292.40 = 3,312.80/x
  3. Step 3: Cross multiply
    8,860.80x = 13,292.40 × 3,312.80
  4. Step 4: Simplify right side
    8,860.80x = 44,035,062.72
  5. Step 5: Solve for x
    x = 44,035,062.72/8,860.80
  6. Step 6: Final answer
    x = 4,969.65

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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.