Home / 20,243.71-27,918.21-12,690.96

Finding the Fourth Proportional to 20,243.71, 27,918.21 and 12,690.96

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Solution

The fourth proportional to 20,243.71, 27,918.21 and 12,690.96 is: 17,502.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,243.71 : 27,918.21 = 12,690.96 : x
  2. Step 2: Convert to fraction form
    20,243.71/27,918.21 = 12,690.96/x
  3. Step 3: Cross multiply
    20,243.71x = 27,918.21 × 12,690.96
  4. Step 4: Simplify right side
    20,243.71x = 354,308,886.38
  5. Step 5: Solve for x
    x = 354,308,886.38/20,243.71
  6. Step 6: Final answer
    x = 17,502.17

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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.