Home / 25,678.77-38,455.21-21,209.07

Finding the Fourth Proportional to 25,678.77, 38,455.21 and 21,209.07

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Solution

The fourth proportional to 25,678.77, 38,455.21 and 21,209.07 is: 31,761.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,678.77 : 38,455.21 = 21,209.07 : x
  2. Step 2: Convert to fraction form
    25,678.77/38,455.21 = 21,209.07/x
  3. Step 3: Cross multiply
    25,678.77x = 38,455.21 × 21,209.07
  4. Step 4: Simplify right side
    25,678.77x = 815,599,240.75
  5. Step 5: Solve for x
    x = 815,599,240.75/25,678.77
  6. Step 6: Final answer
    x = 31,761.62

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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.