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Finding the Fourth Proportional to 5,213.60, 7,839.60 and 4,368.80

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Solution

The fourth proportional to 5,213.60, 7,839.60 and 4,368.80 is: 6,569.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,213.60 : 7,839.60 = 4,368.80 : x
  2. Step 2: Convert to fraction form
    5,213.60/7,839.60 = 4,368.80/x
  3. Step 3: Cross multiply
    5,213.60x = 7,839.60 × 4,368.80
  4. Step 4: Simplify right side
    5,213.60x = 34,249,644.48
  5. Step 5: Solve for x
    x = 34,249,644.48/5,213.60
  6. Step 6: Final answer
    x = 6,569.29

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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.