Home / 5,275.47-7,915.91-2,157.78

Finding the Fourth Proportional to 5,275.47, 7,915.91 and 2,157.78

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Solution

The fourth proportional to 5,275.47, 7,915.91 and 2,157.78 is: 3,237.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,275.47 : 7,915.91 = 2,157.78 : x
  2. Step 2: Convert to fraction form
    5,275.47/7,915.91 = 2,157.78/x
  3. Step 3: Cross multiply
    5,275.47x = 7,915.91 × 2,157.78
  4. Step 4: Simplify right side
    5,275.47x = 17,080,781.49
  5. Step 5: Solve for x
    x = 17,080,781.49/5,275.47
  6. Step 6: Final answer
    x = 3,237.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.