Home / 12,404.78-18,689.91-11,220.19

Finding the Fourth Proportional to 12,404.78, 18,689.91 and 11,220.19

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Solution

The fourth proportional to 12,404.78, 18,689.91 and 11,220.19 is: 16,905.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,404.78 : 18,689.91 = 11,220.19 : x
  2. Step 2: Convert to fraction form
    12,404.78/18,689.91 = 11,220.19/x
  3. Step 3: Cross multiply
    12,404.78x = 18,689.91 × 11,220.19
  4. Step 4: Simplify right side
    12,404.78x = 209,704,341.28
  5. Step 5: Solve for x
    x = 209,704,341.28/12,404.78
  6. Step 6: Final answer
    x = 16,905.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.