Home / 12,454.20-18,681.30-10,121.40

Finding the Fourth Proportional to 12,454.20, 18,681.30 and 10,121.40

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Solution

The fourth proportional to 12,454.20, 18,681.30 and 10,121.40 is: 15,182.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,454.20 : 18,681.30 = 10,121.40 : x
  2. Step 2: Convert to fraction form
    12,454.20/18,681.30 = 10,121.40/x
  3. Step 3: Cross multiply
    12,454.20x = 18,681.30 × 10,121.40
  4. Step 4: Simplify right side
    12,454.20x = 189,080,909.82
  5. Step 5: Solve for x
    x = 189,080,909.82/12,454.20
  6. Step 6: Final answer
    x = 15,182.10

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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.