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Finding the Fourth Proportional to 9,969.73, 13,758.36 and 5,721.47

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Solution

The fourth proportional to 9,969.73, 13,758.36 and 5,721.47 is: 7,895.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,969.73 : 13,758.36 = 5,721.47 : x
  2. Step 2: Convert to fraction form
    9,969.73/13,758.36 = 5,721.47/x
  3. Step 3: Cross multiply
    9,969.73x = 13,758.36 × 5,721.47
  4. Step 4: Simplify right side
    9,969.73x = 78,718,043.99
  5. Step 5: Solve for x
    x = 78,718,043.99/9,969.73
  6. Step 6: Final answer
    x = 7,895.70

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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.