Home / 13,291.10-19,936.68-12,479.18

Finding the Fourth Proportional to 13,291.10, 19,936.68 and 12,479.18

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Solution

The fourth proportional to 13,291.10, 19,936.68 and 12,479.18 is: 18,718.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,291.10 : 19,936.68 = 12,479.18 : x
  2. Step 2: Convert to fraction form
    13,291.10/19,936.68 = 12,479.18/x
  3. Step 3: Cross multiply
    13,291.10x = 19,936.68 × 12,479.18
  4. Step 4: Simplify right side
    13,291.10x = 248,793,418.32
  5. Step 5: Solve for x
    x = 248,793,418.32/13,291.10
  6. Step 6: Final answer
    x = 18,718.80

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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.