Home / 28,221.93-38,947-15,956.36

Finding the Fourth Proportional to 28,221.93, 38,947 and 15,956.36

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Solution

The fourth proportional to 28,221.93, 38,947 and 15,956.36 is: 22,020.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,221.93 : 38,947 = 15,956.36 : x
  2. Step 2: Convert to fraction form
    28,221.93/38,947 = 15,956.36/x
  3. Step 3: Cross multiply
    28,221.93x = 38,947 × 15,956.36
  4. Step 4: Simplify right side
    28,221.93x = 621,452,352.92
  5. Step 5: Solve for x
    x = 621,452,352.92/28,221.93
  6. Step 6: Final answer
    x = 22,020.19

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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.