Home / 27,888.77-38,479.68-15,789.53

Finding the Fourth Proportional to 27,888.77, 38,479.68 and 15,789.53

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Solution

The fourth proportional to 27,888.77, 38,479.68 and 15,789.53 is: 21,785.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,888.77 : 38,479.68 = 15,789.53 : x
  2. Step 2: Convert to fraction form
    27,888.77/38,479.68 = 15,789.53/x
  3. Step 3: Cross multiply
    27,888.77x = 38,479.68 × 15,789.53
  4. Step 4: Simplify right side
    27,888.77x = 607,575,869.35
  5. Step 5: Solve for x
    x = 607,575,869.35/27,888.77
  6. Step 6: Final answer
    x = 21,785.69

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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.