Home / 20,159.42-27,807.85-12,986.97

Finding the Fourth Proportional to 20,159.42, 27,807.85 and 12,986.97

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Solution

The fourth proportional to 20,159.42, 27,807.85 and 12,986.97 is: 17,914.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,159.42 : 27,807.85 = 12,986.97 : x
  2. Step 2: Convert to fraction form
    20,159.42/27,807.85 = 12,986.97/x
  3. Step 3: Cross multiply
    20,159.42x = 27,807.85 × 12,986.97
  4. Step 4: Simplify right side
    20,159.42x = 361,139,713.71
  5. Step 5: Solve for x
    x = 361,139,713.71/20,159.42
  6. Step 6: Final answer
    x = 17,914.19

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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.