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Finding the Fourth Proportional to 18,379.98, 25,378.65 and 14,124.31

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Solution

The fourth proportional to 18,379.98, 25,378.65 and 14,124.31 is: 19,502.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,379.98 : 25,378.65 = 14,124.31 : x
  2. Step 2: Convert to fraction form
    18,379.98/25,378.65 = 14,124.31/x
  3. Step 3: Cross multiply
    18,379.98x = 25,378.65 × 14,124.31
  4. Step 4: Simplify right side
    18,379.98x = 358,455,856.53
  5. Step 5: Solve for x
    x = 358,455,856.53/18,379.98
  6. Step 6: Final answer
    x = 19,502.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.