Home / 15,118.94-20,864.10-8,405.18

Finding the Fourth Proportional to 15,118.94, 20,864.10 and 8,405.18

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Solution

The fourth proportional to 15,118.94, 20,864.10 and 8,405.18 is: 11,599.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,118.94 : 20,864.10 = 8,405.18 : x
  2. Step 2: Convert to fraction form
    15,118.94/20,864.10 = 8,405.18/x
  3. Step 3: Cross multiply
    15,118.94x = 20,864.10 × 8,405.18
  4. Step 4: Simplify right side
    15,118.94x = 175,366,568.20
  5. Step 5: Solve for x
    x = 175,366,568.20/15,118.94
  6. Step 6: Final answer
    x = 11,599.14

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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.