Home / 7,255.28-10,001.40-5,680.64

Finding the Fourth Proportional to 7,255.28, 10,001.40 and 5,680.64

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Solution

The fourth proportional to 7,255.28, 10,001.40 and 5,680.64 is: 7,830.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,255.28 : 10,001.40 = 5,680.64 : x
  2. Step 2: Convert to fraction form
    7,255.28/10,001.40 = 5,680.64/x
  3. Step 3: Cross multiply
    7,255.28x = 10,001.40 × 5,680.64
  4. Step 4: Simplify right side
    7,255.28x = 56,814,352.90
  5. Step 5: Solve for x
    x = 56,814,352.90/7,255.28
  6. Step 6: Final answer
    x = 7,830.76

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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.