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Finding the Fourth Proportional to 10,398.80, 15,598.20 and 3,822.80

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Solution

The fourth proportional to 10,398.80, 15,598.20 and 3,822.80 is: 5,734.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,398.80 : 15,598.20 = 3,822.80 : x
  2. Step 2: Convert to fraction form
    10,398.80/15,598.20 = 3,822.80/x
  3. Step 3: Cross multiply
    10,398.80x = 15,598.20 × 3,822.80
  4. Step 4: Simplify right side
    10,398.80x = 59,628,798.96
  5. Step 5: Solve for x
    x = 59,628,798.96/10,398.80
  6. Step 6: Final answer
    x = 5,734.20

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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.