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Finding the Fourth Proportional to 28,881.42, 43,303.44 and 18,990.71

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Solution

The fourth proportional to 28,881.42, 43,303.44 and 18,990.71 is: 28,473.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,881.42 : 43,303.44 = 18,990.71 : x
  2. Step 2: Convert to fraction form
    28,881.42/43,303.44 = 18,990.71/x
  3. Step 3: Cross multiply
    28,881.42x = 43,303.44 × 18,990.71
  4. Step 4: Simplify right side
    28,881.42x = 822,363,071.04
  5. Step 5: Solve for x
    x = 822,363,071.04/28,881.42
  6. Step 6: Final answer
    x = 28,473.78

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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.