Home / 28,360.88-39,138.01-15,785.36

Finding the Fourth Proportional to 28,360.88, 39,138.01 and 15,785.36

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Solution

The fourth proportional to 28,360.88, 39,138.01 and 15,785.36 is: 21,783.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,360.88 : 39,138.01 = 15,785.36 : x
  2. Step 2: Convert to fraction form
    28,360.88/39,138.01 = 15,785.36/x
  3. Step 3: Cross multiply
    28,360.88x = 39,138.01 × 15,785.36
  4. Step 4: Simplify right side
    28,360.88x = 617,807,342.38
  5. Step 5: Solve for x
    x = 617,807,342.38/28,360.88
  6. Step 6: Final answer
    x = 21,783.79

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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.