Home / 27,890.61-38,489.04-15,315.36

Finding the Fourth Proportional to 27,890.61, 38,489.04 and 15,315.36

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Solution

The fourth proportional to 27,890.61, 38,489.04 and 15,315.36 is: 21,135.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,890.61 : 38,489.04 = 15,315.36 : x
  2. Step 2: Convert to fraction form
    27,890.61/38,489.04 = 15,315.36/x
  3. Step 3: Cross multiply
    27,890.61x = 38,489.04 × 15,315.36
  4. Step 4: Simplify right side
    27,890.61x = 589,473,503.65
  5. Step 5: Solve for x
    x = 589,473,503.65/27,890.61
  6. Step 6: Final answer
    x = 21,135.20

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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.