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Finding the Fourth Proportional to 8,972.80, 13,450.88 and 6,886.40

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Solution

The fourth proportional to 8,972.80, 13,450.88 and 6,886.40 is: 10,323.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,972.80 : 13,450.88 = 6,886.40 : x
  2. Step 2: Convert to fraction form
    8,972.80/13,450.88 = 6,886.40/x
  3. Step 3: Cross multiply
    8,972.80x = 13,450.88 × 6,886.40
  4. Step 4: Simplify right side
    8,972.80x = 92,628,140.03
  5. Step 5: Solve for x
    x = 92,628,140.03/8,972.80
  6. Step 6: Final answer
    x = 10,323.21

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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.