Home / 12,185.28-18,285.48-5,612.40

Finding the Fourth Proportional to 12,185.28, 18,285.48 and 5,612.40

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Solution

The fourth proportional to 12,185.28, 18,285.48 and 5,612.40 is: 8,422.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,185.28 : 18,285.48 = 5,612.40 : x
  2. Step 2: Convert to fraction form
    12,185.28/18,285.48 = 5,612.40/x
  3. Step 3: Cross multiply
    12,185.28x = 18,285.48 × 5,612.40
  4. Step 4: Simplify right side
    12,185.28x = 102,625,427.95
  5. Step 5: Solve for x
    x = 102,625,427.95/12,185.28
  6. Step 6: Final answer
    x = 8,422.08

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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.