Home / 15,784.92-21,782.61-8,711.19

Finding the Fourth Proportional to 15,784.92, 21,782.61 and 8,711.19

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Solution

The fourth proportional to 15,784.92, 21,782.61 and 8,711.19 is: 12,021.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,784.92 : 21,782.61 = 8,711.19 : x
  2. Step 2: Convert to fraction form
    15,784.92/21,782.61 = 8,711.19/x
  3. Step 3: Cross multiply
    15,784.92x = 21,782.61 × 8,711.19
  4. Step 4: Simplify right side
    15,784.92x = 189,752,345.49
  5. Step 5: Solve for x
    x = 189,752,345.49/15,784.92
  6. Step 6: Final answer
    x = 12,021.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.