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Finding the Fourth Proportional to 14,379.78, 21,574.86 and 5,021.18

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Solution

The fourth proportional to 14,379.78, 21,574.86 and 5,021.18 is: 7,533.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,379.78 : 21,574.86 = 5,021.18 : x
  2. Step 2: Convert to fraction form
    14,379.78/21,574.86 = 5,021.18/x
  3. Step 3: Cross multiply
    14,379.78x = 21,574.86 × 5,021.18
  4. Step 4: Simplify right side
    14,379.78x = 108,331,122.55
  5. Step 5: Solve for x
    x = 108,331,122.55/14,379.78
  6. Step 6: Final answer
    x = 7,533.57

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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.