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Finding the Fourth Proportional to 28,672.67, 43,023.10 and 12,888.86

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Solution

The fourth proportional to 28,672.67, 43,023.10 and 12,888.86 is: 19,339.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,672.67 : 43,023.10 = 12,888.86 : x
  2. Step 2: Convert to fraction form
    28,672.67/43,023.10 = 12,888.86/x
  3. Step 3: Cross multiply
    28,672.67x = 43,023.10 × 12,888.86
  4. Step 4: Simplify right side
    28,672.67x = 554,518,465.33
  5. Step 5: Solve for x
    x = 554,518,465.33/28,672.67
  6. Step 6: Final answer
    x = 19,339.62

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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.