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Finding the Fourth Proportional to 8,500.78, 11,731.40 and 4,724.22

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Solution

The fourth proportional to 8,500.78, 11,731.40 and 4,724.22 is: 6,519.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,500.78 : 11,731.40 = 4,724.22 : x
  2. Step 2: Convert to fraction form
    8,500.78/11,731.40 = 4,724.22/x
  3. Step 3: Cross multiply
    8,500.78x = 11,731.40 × 4,724.22
  4. Step 4: Simplify right side
    8,500.78x = 55,421,714.51
  5. Step 5: Solve for x
    x = 55,421,714.51/8,500.78
  6. Step 6: Final answer
    x = 6,519.60

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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.