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Finding the Fourth Proportional to 34,588.88, 47,729.88 and 20,439.20

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Solution

The fourth proportional to 34,588.88, 47,729.88 and 20,439.20 is: 28,204.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,588.88 : 47,729.88 = 20,439.20 : x
  2. Step 2: Convert to fraction form
    34,588.88/47,729.88 = 20,439.20/x
  3. Step 3: Cross multiply
    34,588.88x = 47,729.88 × 20,439.20
  4. Step 4: Simplify right side
    34,588.88x = 975,560,563.30
  5. Step 5: Solve for x
    x = 975,560,563.30/34,588.88
  6. Step 6: Final answer
    x = 28,204.46

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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.