Home / 20,943.30-28,926.43-13,857.42

Finding the Fourth Proportional to 20,943.30, 28,926.43 and 13,857.42

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Solution

The fourth proportional to 20,943.30, 28,926.43 and 13,857.42 is: 19,139.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.30 : 28,926.43 = 13,857.42 : x
  2. Step 2: Convert to fraction form
    20,943.30/28,926.43 = 13,857.42/x
  3. Step 3: Cross multiply
    20,943.30x = 28,926.43 × 13,857.42
  4. Step 4: Simplify right side
    20,943.30x = 400,845,689.61
  5. Step 5: Solve for x
    x = 400,845,689.61/20,943.30
  6. Step 6: Final answer
    x = 19,139.57

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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.