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Finding the Fourth Proportional to 8,989.80, 12,405.06 and 5,010.82

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Solution

The fourth proportional to 8,989.80, 12,405.06 and 5,010.82 is: 6,914.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.80 : 12,405.06 = 5,010.82 : x
  2. Step 2: Convert to fraction form
    8,989.80/12,405.06 = 5,010.82/x
  3. Step 3: Cross multiply
    8,989.80x = 12,405.06 × 5,010.82
  4. Step 4: Simplify right side
    8,989.80x = 62,159,522.75
  5. Step 5: Solve for x
    x = 62,159,522.75/8,989.80
  6. Step 6: Final answer
    x = 6,914.45

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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.