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Finding the Fourth Proportional to 8,865.12, 13,285.16 and 4,918.13

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Solution

The fourth proportional to 8,865.12, 13,285.16 and 4,918.13 is: 7,370.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,865.12 : 13,285.16 = 4,918.13 : x
  2. Step 2: Convert to fraction form
    8,865.12/13,285.16 = 4,918.13/x
  3. Step 3: Cross multiply
    8,865.12x = 13,285.16 × 4,918.13
  4. Step 4: Simplify right side
    8,865.12x = 65,338,143.95
  5. Step 5: Solve for x
    x = 65,338,143.95/8,865.12
  6. Step 6: Final answer
    x = 7,370.25

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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.