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Finding the Fourth Proportional to 8,855.31, 13,280.07 and 2,931.09

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Solution

The fourth proportional to 8,855.31, 13,280.07 and 2,931.09 is: 4,395.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,855.31 : 13,280.07 = 2,931.09 : x
  2. Step 2: Convert to fraction form
    8,855.31/13,280.07 = 2,931.09/x
  3. Step 3: Cross multiply
    8,855.31x = 13,280.07 × 2,931.09
  4. Step 4: Simplify right side
    8,855.31x = 38,925,080.38
  5. Step 5: Solve for x
    x = 38,925,080.38/8,855.31
  6. Step 6: Final answer
    x = 4,395.68

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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.