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Finding the Fourth Proportional to 5,689.64, 7,848.70 and 3,918.18

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Solution

The fourth proportional to 5,689.64, 7,848.70 and 3,918.18 is: 5,405.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,689.64 : 7,848.70 = 3,918.18 : x
  2. Step 2: Convert to fraction form
    5,689.64/7,848.70 = 3,918.18/x
  3. Step 3: Cross multiply
    5,689.64x = 7,848.70 × 3,918.18
  4. Step 4: Simplify right side
    5,689.64x = 30,752,619.37
  5. Step 5: Solve for x
    x = 30,752,619.37/5,689.64
  6. Step 6: Final answer
    x = 5,405.02

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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.