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Finding the Fourth Proportional to 8,628.40, 12,926.40 and 8,045.20

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Solution

The fourth proportional to 8,628.40, 12,926.40 and 8,045.20 is: 12,052.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,628.40 : 12,926.40 = 8,045.20 : x
  2. Step 2: Convert to fraction form
    8,628.40/12,926.40 = 8,045.20/x
  3. Step 3: Cross multiply
    8,628.40x = 12,926.40 × 8,045.20
  4. Step 4: Simplify right side
    8,628.40x = 103,995,473.28
  5. Step 5: Solve for x
    x = 103,995,473.28/8,628.40
  6. Step 6: Final answer
    x = 12,052.69

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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.