Home / 15,351.54-21,187.68-9,689.38

Finding the Fourth Proportional to 15,351.54, 21,187.68 and 9,689.38

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Solution

The fourth proportional to 15,351.54, 21,187.68 and 9,689.38 is: 13,372.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,351.54 : 21,187.68 = 9,689.38 : x
  2. Step 2: Convert to fraction form
    15,351.54/21,187.68 = 9,689.38/x
  3. Step 3: Cross multiply
    15,351.54x = 21,187.68 × 9,689.38
  4. Step 4: Simplify right side
    15,351.54x = 205,295,482.84
  5. Step 5: Solve for x
    x = 205,295,482.84/15,351.54
  6. Step 6: Final answer
    x = 13,372.96

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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.