Home / 27,715.68-38,249.40-15,780.06

Finding the Fourth Proportional to 27,715.68, 38,249.40 and 15,780.06

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Solution

The fourth proportional to 27,715.68, 38,249.40 and 15,780.06 is: 21,777.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,715.68 : 38,249.40 = 15,780.06 : x
  2. Step 2: Convert to fraction form
    27,715.68/38,249.40 = 15,780.06/x
  3. Step 3: Cross multiply
    27,715.68x = 38,249.40 × 15,780.06
  4. Step 4: Simplify right side
    27,715.68x = 603,577,826.96
  5. Step 5: Solve for x
    x = 603,577,826.96/27,715.68
  6. Step 6: Final answer
    x = 21,777.49

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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.