Home / 25,409.78-38,115.42-21,688.54

Finding the Fourth Proportional to 25,409.78, 38,115.42 and 21,688.54

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Solution

The fourth proportional to 25,409.78, 38,115.42 and 21,688.54 is: 32,533.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,409.78 : 38,115.42 = 21,688.54 : x
  2. Step 2: Convert to fraction form
    25,409.78/38,115.42 = 21,688.54/x
  3. Step 3: Cross multiply
    25,409.78x = 38,115.42 × 21,688.54
  4. Step 4: Simplify right side
    25,409.78x = 826,667,811.29
  5. Step 5: Solve for x
    x = 826,667,811.29/25,409.78
  6. Step 6: Final answer
    x = 32,533.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.