Home / 15,687.30-21,656.73-9,716.10

Finding the Fourth Proportional to 15,687.30, 21,656.73 and 9,716.10

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Solution

The fourth proportional to 15,687.30, 21,656.73 and 9,716.10 is: 13,413.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,687.30 : 21,656.73 = 9,716.10 : x
  2. Step 2: Convert to fraction form
    15,687.30/21,656.73 = 9,716.10/x
  3. Step 3: Cross multiply
    15,687.30x = 21,656.73 × 9,716.10
  4. Step 4: Simplify right side
    15,687.30x = 210,418,954.35
  5. Step 5: Solve for x
    x = 210,418,954.35/15,687.30
  6. Step 6: Final answer
    x = 13,413.33

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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.