Home / 21,013.16-28,998.42-13,926.92

Finding the Fourth Proportional to 21,013.16, 28,998.42 and 13,926.92

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Solution

The fourth proportional to 21,013.16, 28,998.42 and 13,926.92 is: 19,219.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.16 : 28,998.42 = 13,926.92 : x
  2. Step 2: Convert to fraction form
    21,013.16/28,998.42 = 13,926.92/x
  3. Step 3: Cross multiply
    21,013.16x = 28,998.42 × 13,926.92
  4. Step 4: Simplify right side
    21,013.16x = 403,858,675.47
  5. Step 5: Solve for x
    x = 403,858,675.47/21,013.16
  6. Step 6: Final answer
    x = 19,219.32

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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.