Home / 8,918.11-12,308.52-5,140.60

Finding the Fourth Proportional to 8,918.11, 12,308.52 and 5,140.60

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Solution

The fourth proportional to 8,918.11, 12,308.52 and 5,140.60 is: 7,094.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.11 : 12,308.52 = 5,140.60 : x
  2. Step 2: Convert to fraction form
    8,918.11/12,308.52 = 5,140.60/x
  3. Step 3: Cross multiply
    8,918.11x = 12,308.52 × 5,140.60
  4. Step 4: Simplify right side
    8,918.11x = 63,273,177.91
  5. Step 5: Solve for x
    x = 63,273,177.91/8,918.11
  6. Step 6: Final answer
    x = 7,094.91

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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.