Home / 28,360.05-39,138.17-15,785.61

Finding the Fourth Proportional to 28,360.05, 39,138.17 and 15,785.61

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Solution

The fourth proportional to 28,360.05, 39,138.17 and 15,785.61 is: 21,784.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,360.05 : 39,138.17 = 15,785.61 : x
  2. Step 2: Convert to fraction form
    28,360.05/39,138.17 = 15,785.61/x
  3. Step 3: Cross multiply
    28,360.05x = 39,138.17 × 15,785.61
  4. Step 4: Simplify right side
    28,360.05x = 617,819,808.81
  5. Step 5: Solve for x
    x = 617,819,808.81/28,360.05
  6. Step 6: Final answer
    x = 21,784.86

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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.