Home / 27,890.42-38,489.46-15,315.17

Finding the Fourth Proportional to 27,890.42, 38,489.46 and 15,315.17

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Solution

The fourth proportional to 27,890.42, 38,489.46 and 15,315.17 is: 21,135.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,890.42 : 38,489.46 = 15,315.17 : x
  2. Step 2: Convert to fraction form
    27,890.42/38,489.46 = 15,315.17/x
  3. Step 3: Cross multiply
    27,890.42x = 38,489.46 × 15,315.17
  4. Step 4: Simplify right side
    27,890.42x = 589,472,623.11
  5. Step 5: Solve for x
    x = 589,472,623.11/27,890.42
  6. Step 6: Final answer
    x = 21,135.31

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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.