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Finding the Fourth Proportional to 9,955.77, 13,739.29 and 5,479.71

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Solution

The fourth proportional to 9,955.77, 13,739.29 and 5,479.71 is: 7,562.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,955.77 : 13,739.29 = 5,479.71 : x
  2. Step 2: Convert to fraction form
    9,955.77/13,739.29 = 5,479.71/x
  3. Step 3: Cross multiply
    9,955.77x = 13,739.29 × 5,479.71
  4. Step 4: Simplify right side
    9,955.77x = 75,287,259.58
  5. Step 5: Solve for x
    x = 75,287,259.58/9,955.77
  6. Step 6: Final answer
    x = 7,562.18

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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.