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Finding the Fourth Proportional to 9,885, 13,643.73 and 5,695.68

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Solution

The fourth proportional to 9,885, 13,643.73 and 5,695.68 is: 7,861.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,885 : 13,643.73 = 5,695.68 : x
  2. Step 2: Convert to fraction form
    9,885/13,643.73 = 5,695.68/x
  3. Step 3: Cross multiply
    9,885x = 13,643.73 × 5,695.68
  4. Step 4: Simplify right side
    9,885x = 77,710,320.09
  5. Step 5: Solve for x
    x = 77,710,320.09/9,885
  6. Step 6: Final answer
    x = 7,861.44

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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.