Home / 28,364.50-39,143.28-15,789.52

Finding the Fourth Proportional to 28,364.50, 39,143.28 and 15,789.52

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Solution

The fourth proportional to 28,364.50, 39,143.28 and 15,789.52 is: 21,789.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,364.50 : 39,143.28 = 15,789.52 : x
  2. Step 2: Convert to fraction form
    28,364.50/39,143.28 = 15,789.52/x
  3. Step 3: Cross multiply
    28,364.50x = 39,143.28 × 15,789.52
  4. Step 4: Simplify right side
    28,364.50x = 618,053,602.43
  5. Step 5: Solve for x
    x = 618,053,602.43/28,364.50
  6. Step 6: Final answer
    x = 21,789.69

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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.