Home / 9,871.58-13,622.46-5,395.40

Finding the Fourth Proportional to 9,871.58, 13,622.46 and 5,395.40

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Solution

The fourth proportional to 9,871.58, 13,622.46 and 5,395.40 is: 7,445.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,871.58 : 13,622.46 = 5,395.40 : x
  2. Step 2: Convert to fraction form
    9,871.58/13,622.46 = 5,395.40/x
  3. Step 3: Cross multiply
    9,871.58x = 13,622.46 × 5,395.40
  4. Step 4: Simplify right side
    9,871.58x = 73,498,620.68
  5. Step 5: Solve for x
    x = 73,498,620.68/9,871.58
  6. Step 6: Final answer
    x = 7,445.48

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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.