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Finding the Fourth Proportional to 28,423.88, 42,637.84 and 8,699.87

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Solution

The fourth proportional to 28,423.88, 42,637.84 and 8,699.87 is: 13,050.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,423.88 : 42,637.84 = 8,699.87 : x
  2. Step 2: Convert to fraction form
    28,423.88/42,637.84 = 8,699.87/x
  3. Step 3: Cross multiply
    28,423.88x = 42,637.84 × 8,699.87
  4. Step 4: Simplify right side
    28,423.88x = 370,943,408.39
  5. Step 5: Solve for x
    x = 370,943,408.39/28,423.88
  6. Step 6: Final answer
    x = 13,050.42

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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.