Home / 21,306.65-31,945.39-11,435.99

Finding the Fourth Proportional to 21,306.65, 31,945.39 and 11,435.99

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Solution

The fourth proportional to 21,306.65, 31,945.39 and 11,435.99 is: 17,146.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,306.65 : 31,945.39 = 11,435.99 : x
  2. Step 2: Convert to fraction form
    21,306.65/31,945.39 = 11,435.99/x
  3. Step 3: Cross multiply
    21,306.65x = 31,945.39 × 11,435.99
  4. Step 4: Simplify right side
    21,306.65x = 365,326,972.27
  5. Step 5: Solve for x
    x = 365,326,972.27/21,306.65
  6. Step 6: Final answer
    x = 17,146.15

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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.