Home / 25,660.87-35,446.00-20,643.98

Finding the Fourth Proportional to 25,660.87, 35,446.00 and 20,643.98

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Solution

The fourth proportional to 25,660.87, 35,446.00 and 20,643.98 is: 28,516.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,660.87 : 35,446.00 = 20,643.98 : x
  2. Step 2: Convert to fraction form
    25,660.87/35,446.00 = 20,643.98/x
  3. Step 3: Cross multiply
    25,660.87x = 35,446.00 × 20,643.98
  4. Step 4: Simplify right side
    25,660.87x = 731,746,552.09
  5. Step 5: Solve for x
    x = 731,746,552.09/25,660.87
  6. Step 6: Final answer
    x = 28,516.05

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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.