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Finding the Fourth Proportional to 18,709.79, 28,064.68 and 8,851.88

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Solution

The fourth proportional to 18,709.79, 28,064.68 and 8,851.88 is: 13,277.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,709.79 : 28,064.68 = 8,851.88 : x
  2. Step 2: Convert to fraction form
    18,709.79/28,064.68 = 8,851.88/x
  3. Step 3: Cross multiply
    18,709.79x = 28,064.68 × 8,851.88
  4. Step 4: Simplify right side
    18,709.79x = 248,425,227.63
  5. Step 5: Solve for x
    x = 248,425,227.63/18,709.79
  6. Step 6: Final answer
    x = 13,277.82

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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.