Home / 28,535.66-39,378.48-15,789.32

Finding the Fourth Proportional to 28,535.66, 39,378.48 and 15,789.32

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Solution

The fourth proportional to 28,535.66, 39,378.48 and 15,789.32 is: 21,788.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,535.66 : 39,378.48 = 15,789.32 : x
  2. Step 2: Convert to fraction form
    28,535.66/39,378.48 = 15,789.32/x
  3. Step 3: Cross multiply
    28,535.66x = 39,378.48 × 15,789.32
  4. Step 4: Simplify right side
    28,535.66x = 621,759,421.83
  5. Step 5: Solve for x
    x = 621,759,421.83/28,535.66
  6. Step 6: Final answer
    x = 21,788.86

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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.