Home / 25,217.76-34,786.80-15,784.32

Finding the Fourth Proportional to 25,217.76, 34,786.80 and 15,784.32

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Solution

The fourth proportional to 25,217.76, 34,786.80 and 15,784.32 is: 21,773.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,217.76 : 34,786.80 = 15,784.32 : x
  2. Step 2: Convert to fraction form
    25,217.76/34,786.80 = 15,784.32/x
  3. Step 3: Cross multiply
    25,217.76x = 34,786.80 × 15,784.32
  4. Step 4: Simplify right side
    25,217.76x = 549,085,982.98
  5. Step 5: Solve for x
    x = 549,085,982.98/25,217.76
  6. Step 6: Final answer
    x = 21,773.78

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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.