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Finding the Fourth Proportional to 28,616.21, 42,926.20 and 9,898.05

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Solution

The fourth proportional to 28,616.21, 42,926.20 and 9,898.05 is: 14,847.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,616.21 : 42,926.20 = 9,898.05 : x
  2. Step 2: Convert to fraction form
    28,616.21/42,926.20 = 9,898.05/x
  3. Step 3: Cross multiply
    28,616.21x = 42,926.20 × 9,898.05
  4. Step 4: Simplify right side
    28,616.21x = 424,885,673.91
  5. Step 5: Solve for x
    x = 424,885,673.91/28,616.21
  6. Step 6: Final answer
    x = 14,847.73

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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.