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Finding the Fourth Proportional to 28,645.49, 42,950.90 and 12,847.65

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Solution

The fourth proportional to 28,645.49, 42,950.90 and 12,847.65 is: 19,263.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,645.49 : 42,950.90 = 12,847.65 : x
  2. Step 2: Convert to fraction form
    28,645.49/42,950.90 = 12,847.65/x
  3. Step 3: Cross multiply
    28,645.49x = 42,950.90 × 12,847.65
  4. Step 4: Simplify right side
    28,645.49x = 551,818,066.15
  5. Step 5: Solve for x
    x = 551,818,066.15/28,645.49
  6. Step 6: Final answer
    x = 19,263.70

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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.