Home / 15,717.12-21,693.74-9,745.40

Finding the Fourth Proportional to 15,717.12, 21,693.74 and 9,745.40

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Solution

The fourth proportional to 15,717.12, 21,693.74 and 9,745.40 is: 13,451.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,717.12 : 21,693.74 = 9,745.40 : x
  2. Step 2: Convert to fraction form
    15,717.12/21,693.74 = 9,745.40/x
  3. Step 3: Cross multiply
    15,717.12x = 21,693.74 × 9,745.40
  4. Step 4: Simplify right side
    15,717.12x = 211,414,016.60
  5. Step 5: Solve for x
    x = 211,414,016.60/15,717.12
  6. Step 6: Final answer
    x = 13,451.19

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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.