Home / 9,881.52-13,640.60-7,359.20

Finding the Fourth Proportional to 9,881.52, 13,640.60 and 7,359.20

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Solution

The fourth proportional to 9,881.52, 13,640.60 and 7,359.20 is: 10,158.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,881.52 : 13,640.60 = 7,359.20 : x
  2. Step 2: Convert to fraction form
    9,881.52/13,640.60 = 7,359.20/x
  3. Step 3: Cross multiply
    9,881.52x = 13,640.60 × 7,359.20
  4. Step 4: Simplify right side
    9,881.52x = 100,383,903.52
  5. Step 5: Solve for x
    x = 100,383,903.52/9,881.52
  6. Step 6: Final answer
    x = 10,158.75

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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.