Home / 7,155.90-9,875.64-4,170.60

Finding the Fourth Proportional to 7,155.90, 9,875.64 and 4,170.60

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Solution

The fourth proportional to 7,155.90, 9,875.64 and 4,170.60 is: 5,755.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,155.90 : 9,875.64 = 4,170.60 : x
  2. Step 2: Convert to fraction form
    7,155.90/9,875.64 = 4,170.60/x
  3. Step 3: Cross multiply
    7,155.90x = 9,875.64 × 4,170.60
  4. Step 4: Simplify right side
    7,155.90x = 41,187,344.18
  5. Step 5: Solve for x
    x = 41,187,344.18/7,155.90
  6. Step 6: Final answer
    x = 5,755.72

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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.