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Finding the Fourth Proportional to 28,991.51, 43,503.68 and 12,349.81

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Solution

The fourth proportional to 28,991.51, 43,503.68 and 12,349.81 is: 18,531.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,991.51 : 43,503.68 = 12,349.81 : x
  2. Step 2: Convert to fraction form
    28,991.51/43,503.68 = 12,349.81/x
  3. Step 3: Cross multiply
    28,991.51x = 43,503.68 × 12,349.81
  4. Step 4: Simplify right side
    28,991.51x = 537,262,120.55
  5. Step 5: Solve for x
    x = 537,262,120.55/28,991.51
  6. Step 6: Final answer
    x = 18,531.71

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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.