Home / 18,411.72-25,407.62-11,239.05

Finding the Fourth Proportional to 18,411.72, 25,407.62 and 11,239.05

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Solution

The fourth proportional to 18,411.72, 25,407.62 and 11,239.05 is: 15,509.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,411.72 : 25,407.62 = 11,239.05 : x
  2. Step 2: Convert to fraction form
    18,411.72/25,407.62 = 11,239.05/x
  3. Step 3: Cross multiply
    18,411.72x = 25,407.62 × 11,239.05
  4. Step 4: Simplify right side
    18,411.72x = 285,557,569.05
  5. Step 5: Solve for x
    x = 285,557,569.05/18,411.72
  6. Step 6: Final answer
    x = 15,509.55

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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.