Home / 15,111.82-20,854.43-8,398.07

Finding the Fourth Proportional to 15,111.82, 20,854.43 and 8,398.07

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Solution

The fourth proportional to 15,111.82, 20,854.43 and 8,398.07 is: 11,589.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,111.82 : 20,854.43 = 8,398.07 : x
  2. Step 2: Convert to fraction form
    15,111.82/20,854.43 = 8,398.07/x
  3. Step 3: Cross multiply
    15,111.82x = 20,854.43 × 8,398.07
  4. Step 4: Simplify right side
    15,111.82x = 175,136,962.95
  5. Step 5: Solve for x
    x = 175,136,962.95/15,111.82
  6. Step 6: Final answer
    x = 11,589.40

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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.