Home / 20,918.52-28,886.31-15,604.11

Finding the Fourth Proportional to 20,918.52, 28,886.31 and 15,604.11

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Solution

The fourth proportional to 20,918.52, 28,886.31 and 15,604.11 is: 21,547.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.52 : 28,886.31 = 15,604.11 : x
  2. Step 2: Convert to fraction form
    20,918.52/28,886.31 = 15,604.11/x
  3. Step 3: Cross multiply
    20,918.52x = 28,886.31 × 15,604.11
  4. Step 4: Simplify right side
    20,918.52x = 450,745,158.73
  5. Step 5: Solve for x
    x = 450,745,158.73/20,918.52
  6. Step 6: Final answer
    x = 21,547.66

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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.