Home / 21,986.10-32,979.15-13,718.70

Finding the Fourth Proportional to 21,986.10, 32,979.15 and 13,718.70

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Solution

The fourth proportional to 21,986.10, 32,979.15 and 13,718.70 is: 20,578.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,986.10 : 32,979.15 = 13,718.70 : x
  2. Step 2: Convert to fraction form
    21,986.10/32,979.15 = 13,718.70/x
  3. Step 3: Cross multiply
    21,986.10x = 32,979.15 × 13,718.70
  4. Step 4: Simplify right side
    21,986.10x = 452,431,065.11
  5. Step 5: Solve for x
    x = 452,431,065.11/21,986.10
  6. Step 6: Final answer
    x = 20,578.05

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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.