Home / 4,781.78-7,172.88-2,931.74

Finding the Fourth Proportional to 4,781.78, 7,172.88 and 2,931.74

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Solution

The fourth proportional to 4,781.78, 7,172.88 and 2,931.74 is: 4,397.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,781.78 : 7,172.88 = 2,931.74 : x
  2. Step 2: Convert to fraction form
    4,781.78/7,172.88 = 2,931.74/x
  3. Step 3: Cross multiply
    4,781.78x = 7,172.88 × 2,931.74
  4. Step 4: Simplify right side
    4,781.78x = 21,029,019.21
  5. Step 5: Solve for x
    x = 21,029,019.21/4,781.78
  6. Step 6: Final answer
    x = 4,397.74

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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.