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Finding the Fourth Proportional to 25,871.20, 38,749.20 and 21,263.20

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Solution

The fourth proportional to 25,871.20, 38,749.20 and 21,263.20 is: 31,847.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,871.20 : 38,749.20 = 21,263.20 : x
  2. Step 2: Convert to fraction form
    25,871.20/38,749.20 = 21,263.20/x
  3. Step 3: Cross multiply
    25,871.20x = 38,749.20 × 21,263.20
  4. Step 4: Simplify right side
    25,871.20x = 823,931,989.44
  5. Step 5: Solve for x
    x = 823,931,989.44/25,871.20
  6. Step 6: Final answer
    x = 31,847.46

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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.