Home / 4,781.60-7,172.40-4,425.20

Finding the Fourth Proportional to 4,781.60, 7,172.40 and 4,425.20

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Solution

The fourth proportional to 4,781.60, 7,172.40 and 4,425.20 is: 6,637.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,781.60 : 7,172.40 = 4,425.20 : x
  2. Step 2: Convert to fraction form
    4,781.60/7,172.40 = 4,425.20/x
  3. Step 3: Cross multiply
    4,781.60x = 7,172.40 × 4,425.20
  4. Step 4: Simplify right side
    4,781.60x = 31,739,304.48
  5. Step 5: Solve for x
    x = 31,739,304.48/4,781.60
  6. Step 6: Final answer
    x = 6,637.80

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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.