Home / 19,990.11-27,585.88-10,915.12

Finding the Fourth Proportional to 19,990.11, 27,585.88 and 10,915.12

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Solution

The fourth proportional to 19,990.11, 27,585.88 and 10,915.12 is: 15,062.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,990.11 : 27,585.88 = 10,915.12 : x
  2. Step 2: Convert to fraction form
    19,990.11/27,585.88 = 10,915.12/x
  3. Step 3: Cross multiply
    19,990.11x = 27,585.88 × 10,915.12
  4. Step 4: Simplify right side
    19,990.11x = 301,103,190.51
  5. Step 5: Solve for x
    x = 301,103,190.51/19,990.11
  6. Step 6: Final answer
    x = 15,062.61

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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.