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Finding the Fourth Proportional to 8,995.70, 12,410.80 and 5,216.78

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Solution

The fourth proportional to 8,995.70, 12,410.80 and 5,216.78 is: 7,197.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,995.70 : 12,410.80 = 5,216.78 : x
  2. Step 2: Convert to fraction form
    8,995.70/12,410.80 = 5,216.78/x
  3. Step 3: Cross multiply
    8,995.70x = 12,410.80 × 5,216.78
  4. Step 4: Simplify right side
    8,995.70x = 64,744,384.67
  5. Step 5: Solve for x
    x = 64,744,384.67/8,995.70
  6. Step 6: Final answer
    x = 7,197.26

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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.