Home / 27,689.68-38,210.87-15,590.78

Finding the Fourth Proportional to 27,689.68, 38,210.87 and 15,590.78

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Solution

The fourth proportional to 27,689.68, 38,210.87 and 15,590.78 is: 21,514.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,689.68 : 38,210.87 = 15,590.78 : x
  2. Step 2: Convert to fraction form
    27,689.68/38,210.87 = 15,590.78/x
  3. Step 3: Cross multiply
    27,689.68x = 38,210.87 × 15,590.78
  4. Step 4: Simplify right side
    27,689.68x = 595,737,258.99
  5. Step 5: Solve for x
    x = 595,737,258.99/27,689.68
  6. Step 6: Final answer
    x = 21,514.77

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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.