Home / 22,987.43-31,720.69-12,915.08

Finding the Fourth Proportional to 22,987.43, 31,720.69 and 12,915.08

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Solution

The fourth proportional to 22,987.43, 31,720.69 and 12,915.08 is: 17,821.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,987.43 : 31,720.69 = 12,915.08 : x
  2. Step 2: Convert to fraction form
    22,987.43/31,720.69 = 12,915.08/x
  3. Step 3: Cross multiply
    22,987.43x = 31,720.69 × 12,915.08
  4. Step 4: Simplify right side
    22,987.43x = 409,675,249.01
  5. Step 5: Solve for x
    x = 409,675,249.01/22,987.43
  6. Step 6: Final answer
    x = 17,821.71

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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.