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Finding the Fourth Proportional to 28,672.80, 43,023.29 and 12,888.98

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Solution

The fourth proportional to 28,672.80, 43,023.29 and 12,888.98 is: 19,339.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,672.80 : 43,023.29 = 12,888.98 : x
  2. Step 2: Convert to fraction form
    28,672.80/43,023.29 = 12,888.98/x
  3. Step 3: Cross multiply
    28,672.80x = 43,023.29 × 12,888.98
  4. Step 4: Simplify right side
    28,672.80x = 554,526,206.12
  5. Step 5: Solve for x
    x = 554,526,206.12/28,672.80
  6. Step 6: Final answer
    x = 19,339.80

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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.