Home / 19,189.78-28,731.52-9,809.60

Finding the Fourth Proportional to 19,189.78, 28,731.52 and 9,809.60

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Solution

The fourth proportional to 19,189.78, 28,731.52 and 9,809.60 is: 14,687.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,189.78 : 28,731.52 = 9,809.60 : x
  2. Step 2: Convert to fraction form
    19,189.78/28,731.52 = 9,809.60/x
  3. Step 3: Cross multiply
    19,189.78x = 28,731.52 × 9,809.60
  4. Step 4: Simplify right side
    19,189.78x = 281,844,718.59
  5. Step 5: Solve for x
    x = 281,844,718.59/19,189.78
  6. Step 6: Final answer
    x = 14,687.23

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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.