Home / 15,718.20-21,685.72-9,747.72

Finding the Fourth Proportional to 15,718.20, 21,685.72 and 9,747.72

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Solution

The fourth proportional to 15,718.20, 21,685.72 and 9,747.72 is: 13,448.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,718.20 : 21,685.72 = 9,747.72 : x
  2. Step 2: Convert to fraction form
    15,718.20/21,685.72 = 9,747.72/x
  3. Step 3: Cross multiply
    15,718.20x = 21,685.72 × 9,747.72
  4. Step 4: Simplify right side
    15,718.20x = 211,386,326.56
  5. Step 5: Solve for x
    x = 211,386,326.56/15,718.20
  6. Step 6: Final answer
    x = 13,448.51

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.