Home / 7,155.12-9,877.78-5,558.20

Finding the Fourth Proportional to 7,155.12, 9,877.78 and 5,558.20

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Solution

The fourth proportional to 7,155.12, 9,877.78 and 5,558.20 is: 7,673.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,155.12 : 9,877.78 = 5,558.20 : x
  2. Step 2: Convert to fraction form
    7,155.12/9,877.78 = 5,558.20/x
  3. Step 3: Cross multiply
    7,155.12x = 9,877.78 × 5,558.20
  4. Step 4: Simplify right side
    7,155.12x = 54,902,659.05
  5. Step 5: Solve for x
    x = 54,902,659.05/7,155.12
  6. Step 6: Final answer
    x = 7,673.19

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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.