Home / 28,364.52-39,142.65-15,789.27

Finding the Fourth Proportional to 28,364.52, 39,142.65 and 15,789.27

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Solution

The fourth proportional to 28,364.52, 39,142.65 and 15,789.27 is: 21,788.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,364.52 : 39,142.65 = 15,789.27 : x
  2. Step 2: Convert to fraction form
    28,364.52/39,142.65 = 15,789.27/x
  3. Step 3: Cross multiply
    28,364.52x = 39,142.65 × 15,789.27
  4. Step 4: Simplify right side
    28,364.52x = 618,033,869.37
  5. Step 5: Solve for x
    x = 618,033,869.37/28,364.52
  6. Step 6: Final answer
    x = 21,788.98

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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.