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Finding the Fourth Proportional to 19.60, 29.40 and 7.57

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Solution

The fourth proportional to 19.60, 29.40 and 7.57 is: 11.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.60 : 29.40 = 7.57 : x
  2. Step 2: Convert to fraction form
    19.60/29.40 = 7.57/x
  3. Step 3: Cross multiply
    19.60x = 29.40 × 7.57
  4. Step 4: Simplify right side
    19.60x = 222.48
  5. Step 5: Solve for x
    x = 222.48/19.60
  6. Step 6: Final answer
    x = 11.35

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