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Finding the Fourth Proportional to 8,153.80, 12,206.40 and 4,865.20

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Solution

The fourth proportional to 8,153.80, 12,206.40 and 4,865.20 is: 7,283.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,153.80 : 12,206.40 = 4,865.20 : x
  2. Step 2: Convert to fraction form
    8,153.80/12,206.40 = 4,865.20/x
  3. Step 3: Cross multiply
    8,153.80x = 12,206.40 × 4,865.20
  4. Step 4: Simplify right side
    8,153.80x = 59,386,577.28
  5. Step 5: Solve for x
    x = 59,386,577.28/8,153.80
  6. Step 6: Final answer
    x = 7,283.30

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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.