Home / 21,195.69-31,793.55-15,389.19

Finding the Fourth Proportional to 21,195.69, 31,793.55 and 15,389.19

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Solution

The fourth proportional to 21,195.69, 31,793.55 and 15,389.19 is: 23,083.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,195.69 : 31,793.55 = 15,389.19 : x
  2. Step 2: Convert to fraction form
    21,195.69/31,793.55 = 15,389.19/x
  3. Step 3: Cross multiply
    21,195.69x = 31,793.55 × 15,389.19
  4. Step 4: Simplify right side
    21,195.69x = 489,276,981.72
  5. Step 5: Solve for x
    x = 489,276,981.72/21,195.69
  6. Step 6: Final answer
    x = 23,083.80

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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.