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Finding the Fourth Proportional to 19,277.80, 28,916.70 and 9,423.40

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Solution

The fourth proportional to 19,277.80, 28,916.70 and 9,423.40 is: 14,135.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,277.80 : 28,916.70 = 9,423.40 : x
  2. Step 2: Convert to fraction form
    19,277.80/28,916.70 = 9,423.40/x
  3. Step 3: Cross multiply
    19,277.80x = 28,916.70 × 9,423.40
  4. Step 4: Simplify right side
    19,277.80x = 272,493,630.78
  5. Step 5: Solve for x
    x = 272,493,630.78/19,277.80
  6. Step 6: Final answer
    x = 14,135.10

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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.