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Finding the Fourth Proportional to 48,438.95, 72,661.50 and 12,899.69

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Solution

The fourth proportional to 48,438.95, 72,661.50 and 12,899.69 is: 19,350.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,438.95 : 72,661.50 = 12,899.69 : x
  2. Step 2: Convert to fraction form
    48,438.95/72,661.50 = 12,899.69/x
  3. Step 3: Cross multiply
    48,438.95x = 72,661.50 × 12,899.69
  4. Step 4: Simplify right side
    48,438.95x = 937,310,824.94
  5. Step 5: Solve for x
    x = 937,310,824.94/48,438.95
  6. Step 6: Final answer
    x = 19,350.35

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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.