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Finding the Fourth Proportional to 28,772.76, 39,713.86 and 25,783.48

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Solution

The fourth proportional to 28,772.76, 39,713.86 and 25,783.48 is: 35,587.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,772.76 : 39,713.86 = 25,783.48 : x
  2. Step 2: Convert to fraction form
    28,772.76/39,713.86 = 25,783.48/x
  3. Step 3: Cross multiply
    28,772.76x = 39,713.86 × 25,783.48
  4. Step 4: Simplify right side
    28,772.76x = 1,023,961,515.03
  5. Step 5: Solve for x
    x = 1,023,961,515.03/28,772.76
  6. Step 6: Final answer
    x = 35,587.88

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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.