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Finding the Fourth Proportional to 10,612.40, 15,918.59 and 2,821.22

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Solution

The fourth proportional to 10,612.40, 15,918.59 and 2,821.22 is: 4,231.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,612.40 : 15,918.59 = 2,821.22 : x
  2. Step 2: Convert to fraction form
    10,612.40/15,918.59 = 2,821.22/x
  3. Step 3: Cross multiply
    10,612.40x = 15,918.59 × 2,821.22
  4. Step 4: Simplify right side
    10,612.40x = 44,909,750.78
  5. Step 5: Solve for x
    x = 44,909,750.78/10,612.40
  6. Step 6: Final answer
    x = 4,231.82

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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.