Home / 7,087.28-9,781.20-5,405.60

Finding the Fourth Proportional to 7,087.28, 9,781.20 and 5,405.60

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Solution

The fourth proportional to 7,087.28, 9,781.20 and 5,405.60 is: 7,460.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,087.28 : 9,781.20 = 5,405.60 : x
  2. Step 2: Convert to fraction form
    7,087.28/9,781.20 = 5,405.60/x
  3. Step 3: Cross multiply
    7,087.28x = 9,781.20 × 5,405.60
  4. Step 4: Simplify right side
    7,087.28x = 52,873,254.72
  5. Step 5: Solve for x
    x = 52,873,254.72/7,087.28
  6. Step 6: Final answer
    x = 7,460.30

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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.