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Finding the Fourth Proportional to 19,416.80, 29,132.40 and 7,738.40

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Solution

The fourth proportional to 19,416.80, 29,132.40 and 7,738.40 is: 11,610.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,416.80 : 29,132.40 = 7,738.40 : x
  2. Step 2: Convert to fraction form
    19,416.80/29,132.40 = 7,738.40/x
  3. Step 3: Cross multiply
    19,416.80x = 29,132.40 × 7,738.40
  4. Step 4: Simplify right side
    19,416.80x = 225,438,164.16
  5. Step 5: Solve for x
    x = 225,438,164.16/19,416.80
  6. Step 6: Final answer
    x = 11,610.47

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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.