Home / 19,306.31-28,963.71-10,990.25

Finding the Fourth Proportional to 19,306.31, 28,963.71 and 10,990.25

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Solution

The fourth proportional to 19,306.31, 28,963.71 and 10,990.25 is: 16,487.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,306.31 : 28,963.71 = 10,990.25 : x
  2. Step 2: Convert to fraction form
    19,306.31/28,963.71 = 10,990.25/x
  3. Step 3: Cross multiply
    19,306.31x = 28,963.71 × 10,990.25
  4. Step 4: Simplify right side
    19,306.31x = 318,318,269.01
  5. Step 5: Solve for x
    x = 318,318,269.01/19,306.31
  6. Step 6: Final answer
    x = 16,487.79

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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.