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Finding the Fourth Proportional to 19,485.60, 29,212.20 and 10,251.60

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Solution

The fourth proportional to 19,485.60, 29,212.20 and 10,251.60 is: 15,368.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,485.60 : 29,212.20 = 10,251.60 : x
  2. Step 2: Convert to fraction form
    19,485.60/29,212.20 = 10,251.60/x
  3. Step 3: Cross multiply
    19,485.60x = 29,212.20 × 10,251.60
  4. Step 4: Simplify right side
    19,485.60x = 299,471,789.52
  5. Step 5: Solve for x
    x = 299,471,789.52/19,485.60
  6. Step 6: Final answer
    x = 15,368.88

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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.