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Finding the Fourth Proportional to 28,658.35, 42,994.98 and 10,889.35

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Solution

The fourth proportional to 28,658.35, 42,994.98 and 10,889.35 is: 16,336.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,658.35 : 42,994.98 = 10,889.35 : x
  2. Step 2: Convert to fraction form
    28,658.35/42,994.98 = 10,889.35/x
  3. Step 3: Cross multiply
    28,658.35x = 42,994.98 × 10,889.35
  4. Step 4: Simplify right side
    28,658.35x = 468,187,385.46
  5. Step 5: Solve for x
    x = 468,187,385.46/28,658.35
  6. Step 6: Final answer
    x = 16,336.86

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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.