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Finding the Fourth Proportional to 18,900.60, 28,353.95 and 5,749.88

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Solution

The fourth proportional to 18,900.60, 28,353.95 and 5,749.88 is: 8,625.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,900.60 : 28,353.95 = 5,749.88 : x
  2. Step 2: Convert to fraction form
    18,900.60/28,353.95 = 5,749.88/x
  3. Step 3: Cross multiply
    18,900.60x = 28,353.95 × 5,749.88
  4. Step 4: Simplify right side
    18,900.60x = 163,031,682.63
  5. Step 5: Solve for x
    x = 163,031,682.63/18,900.60
  6. Step 6: Final answer
    x = 8,625.74

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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.