Home / 19,287.20-28,898.40-9,405.20

Finding the Fourth Proportional to 19,287.20, 28,898.40 and 9,405.20

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Solution

The fourth proportional to 19,287.20, 28,898.40 and 9,405.20 is: 14,092.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,287.20 : 28,898.40 = 9,405.20 : x
  2. Step 2: Convert to fraction form
    19,287.20/28,898.40 = 9,405.20/x
  3. Step 3: Cross multiply
    19,287.20x = 28,898.40 × 9,405.20
  4. Step 4: Simplify right side
    19,287.20x = 271,795,231.68
  5. Step 5: Solve for x
    x = 271,795,231.68/19,287.20
  6. Step 6: Final answer
    x = 14,092.00

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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.