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Finding the Fourth Proportional to 19,229.60, 28,828.20 and 9,995.60

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Solution

The fourth proportional to 19,229.60, 28,828.20 and 9,995.60 is: 14,984.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,229.60 : 28,828.20 = 9,995.60 : x
  2. Step 2: Convert to fraction form
    19,229.60/28,828.20 = 9,995.60/x
  3. Step 3: Cross multiply
    19,229.60x = 28,828.20 × 9,995.60
  4. Step 4: Simplify right side
    19,229.60x = 288,155,155.92
  5. Step 5: Solve for x
    x = 288,155,155.92/19,229.60
  6. Step 6: Final answer
    x = 14,984.98

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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.