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Finding the Fourth Proportional to 8,387.91, 11,555.30 and 5,865.30

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Solution

The fourth proportional to 8,387.91, 11,555.30 and 5,865.30 is: 8,080.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,387.91 : 11,555.30 = 5,865.30 : x
  2. Step 2: Convert to fraction form
    8,387.91/11,555.30 = 5,865.30/x
  3. Step 3: Cross multiply
    8,387.91x = 11,555.30 × 5,865.30
  4. Step 4: Simplify right side
    8,387.91x = 67,775,271.76
  5. Step 5: Solve for x
    x = 67,775,271.76/8,387.91
  6. Step 6: Final answer
    x = 8,080.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.