Home / 27,721.76-38,257.66-15,785.60

Finding the Fourth Proportional to 27,721.76, 38,257.66 and 15,785.60

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Solution

The fourth proportional to 27,721.76, 38,257.66 and 15,785.60 is: 21,785.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,721.76 : 38,257.66 = 15,785.60 : x
  2. Step 2: Convert to fraction form
    27,721.76/38,257.66 = 15,785.60/x
  3. Step 3: Cross multiply
    27,721.76x = 38,257.66 × 15,785.60
  4. Step 4: Simplify right side
    27,721.76x = 603,920,117.70
  5. Step 5: Solve for x
    x = 603,920,117.70/27,721.76
  6. Step 6: Final answer
    x = 21,785.06

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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.