Home / 12,486.18-18,729.09-3,126.16

Finding the Fourth Proportional to 12,486.18, 18,729.09 and 3,126.16

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Solution

The fourth proportional to 12,486.18, 18,729.09 and 3,126.16 is: 4,689.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,486.18 : 18,729.09 = 3,126.16 : x
  2. Step 2: Convert to fraction form
    12,486.18/18,729.09 = 3,126.16/x
  3. Step 3: Cross multiply
    12,486.18x = 18,729.09 × 3,126.16
  4. Step 4: Simplify right side
    12,486.18x = 58,550,155.41
  5. Step 5: Solve for x
    x = 58,550,155.41/12,486.18
  6. Step 6: Final answer
    x = 4,689.20

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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.