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Finding the Fourth Proportional to 28,771.76, 39,712.48 and 25,782.48

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Solution

The fourth proportional to 28,771.76, 39,712.48 and 25,782.48 is: 35,586.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,771.76 : 39,712.48 = 25,782.48 : x
  2. Step 2: Convert to fraction form
    28,771.76/39,712.48 = 25,782.48/x
  3. Step 3: Cross multiply
    28,771.76x = 39,712.48 × 25,782.48
  4. Step 4: Simplify right side
    28,771.76x = 1,023,886,221.35
  5. Step 5: Solve for x
    x = 1,023,886,221.35/28,771.76
  6. Step 6: Final answer
    x = 35,586.50

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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.