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Finding the Fourth Proportional to 14,278.56, 21,420.12 and 4,916.27

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Solution

The fourth proportional to 14,278.56, 21,420.12 and 4,916.27 is: 7,375.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,278.56 : 21,420.12 = 4,916.27 : x
  2. Step 2: Convert to fraction form
    14,278.56/21,420.12 = 4,916.27/x
  3. Step 3: Cross multiply
    14,278.56x = 21,420.12 × 4,916.27
  4. Step 4: Simplify right side
    14,278.56x = 105,306,986.25
  5. Step 5: Solve for x
    x = 105,306,986.25/14,278.56
  6. Step 6: Final answer
    x = 7,375.18

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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.