Home / 28,363.50-39,141.63-15,789.06

Finding the Fourth Proportional to 28,363.50, 39,141.63 and 15,789.06

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Solution

The fourth proportional to 28,363.50, 39,141.63 and 15,789.06 is: 21,788.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,363.50 : 39,141.63 = 15,789.06 : x
  2. Step 2: Convert to fraction form
    28,363.50/39,141.63 = 15,789.06/x
  3. Step 3: Cross multiply
    28,363.50x = 39,141.63 × 15,789.06
  4. Step 4: Simplify right side
    28,363.50x = 618,009,544.57
  5. Step 5: Solve for x
    x = 618,009,544.57/28,363.50
  6. Step 6: Final answer
    x = 21,788.90

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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.