Home / 28,006.85-42,017.70-12,205.10

Finding the Fourth Proportional to 28,006.85, 42,017.70 and 12,205.10

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Solution

The fourth proportional to 28,006.85, 42,017.70 and 12,205.10 is: 18,310.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,006.85 : 42,017.70 = 12,205.10 : x
  2. Step 2: Convert to fraction form
    28,006.85/42,017.70 = 12,205.10/x
  3. Step 3: Cross multiply
    28,006.85x = 42,017.70 × 12,205.10
  4. Step 4: Simplify right side
    28,006.85x = 512,830,230.27
  5. Step 5: Solve for x
    x = 512,830,230.27/28,006.85
  6. Step 6: Final answer
    x = 18,310.89

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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.