Home / 28,536.74-39,381.86-15,789.70

Finding the Fourth Proportional to 28,536.74, 39,381.86 and 15,789.70

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Solution

The fourth proportional to 28,536.74, 39,381.86 and 15,789.70 is: 21,790.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,536.74 : 39,381.86 = 15,789.70 : x
  2. Step 2: Convert to fraction form
    28,536.74/39,381.86 = 15,789.70/x
  3. Step 3: Cross multiply
    28,536.74x = 39,381.86 × 15,789.70
  4. Step 4: Simplify right side
    28,536.74x = 621,827,754.84
  5. Step 5: Solve for x
    x = 621,827,754.84/28,536.74
  6. Step 6: Final answer
    x = 21,790.43

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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.