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Finding the Fourth Proportional to 19,661.60, 29,427.60 and 15,255.20

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Solution

The fourth proportional to 19,661.60, 29,427.60 and 15,255.20 is: 22,832.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,661.60 : 29,427.60 = 15,255.20 : x
  2. Step 2: Convert to fraction form
    19,661.60/29,427.60 = 15,255.20/x
  3. Step 3: Cross multiply
    19,661.60x = 29,427.60 × 15,255.20
  4. Step 4: Simplify right side
    19,661.60x = 448,923,923.52
  5. Step 5: Solve for x
    x = 448,923,923.52/19,661.60
  6. Step 6: Final answer
    x = 22,832.52

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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.