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Finding the Fourth Proportional to 12,916.70, 19,374.98 and 4,151.64

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Solution

The fourth proportional to 12,916.70, 19,374.98 and 4,151.64 is: 6,227.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,916.70 : 19,374.98 = 4,151.64 : x
  2. Step 2: Convert to fraction form
    12,916.70/19,374.98 = 4,151.64/x
  3. Step 3: Cross multiply
    12,916.70x = 19,374.98 × 4,151.64
  4. Step 4: Simplify right side
    12,916.70x = 80,437,941.97
  5. Step 5: Solve for x
    x = 80,437,941.97/12,916.70
  6. Step 6: Final answer
    x = 6,227.44

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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.