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Finding the Fourth Proportional to 9,888.64, 13,651.24 and 5,696.08

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Solution

The fourth proportional to 9,888.64, 13,651.24 and 5,696.08 is: 7,863.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,888.64 : 13,651.24 = 5,696.08 : x
  2. Step 2: Convert to fraction form
    9,888.64/13,651.24 = 5,696.08/x
  3. Step 3: Cross multiply
    9,888.64x = 13,651.24 × 5,696.08
  4. Step 4: Simplify right side
    9,888.64x = 77,758,555.14
  5. Step 5: Solve for x
    x = 77,758,555.14/9,888.64
  6. Step 6: Final answer
    x = 7,863.42

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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.