Home / 21,197.19-31,795.79-15,390.71

Finding the Fourth Proportional to 21,197.19, 31,795.79 and 15,390.71

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Solution

The fourth proportional to 21,197.19, 31,795.79 and 15,390.71 is: 23,086.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,197.19 : 31,795.79 = 15,390.71 : x
  2. Step 2: Convert to fraction form
    21,197.19/31,795.79 = 15,390.71/x
  3. Step 3: Cross multiply
    21,197.19x = 31,795.79 × 15,390.71
  4. Step 4: Simplify right side
    21,197.19x = 489,359,547.18
  5. Step 5: Solve for x
    x = 489,359,547.18/21,197.19
  6. Step 6: Final answer
    x = 23,086.06

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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.