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Finding the Fourth Proportional to 8,857.40, 13,266.90 and 7,321.40

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Solution

The fourth proportional to 8,857.40, 13,266.90 and 7,321.40 is: 10,966.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,857.40 : 13,266.90 = 7,321.40 : x
  2. Step 2: Convert to fraction form
    8,857.40/13,266.90 = 7,321.40/x
  3. Step 3: Cross multiply
    8,857.40x = 13,266.90 × 7,321.40
  4. Step 4: Simplify right side
    8,857.40x = 97,132,281.66
  5. Step 5: Solve for x
    x = 97,132,281.66/8,857.40
  6. Step 6: Final answer
    x = 10,966.23

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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.