Home / 15,830.78-21,849.51-11,305.74

Finding the Fourth Proportional to 15,830.78, 21,849.51 and 11,305.74

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Solution

The fourth proportional to 15,830.78, 21,849.51 and 11,305.74 is: 15,604.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,830.78 : 21,849.51 = 11,305.74 : x
  2. Step 2: Convert to fraction form
    15,830.78/21,849.51 = 11,305.74/x
  3. Step 3: Cross multiply
    15,830.78x = 21,849.51 × 11,305.74
  4. Step 4: Simplify right side
    15,830.78x = 247,024,879.19
  5. Step 5: Solve for x
    x = 247,024,879.19/15,830.78
  6. Step 6: Final answer
    x = 15,604.09

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1.5x scale

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.