Home / 28,135.15-42,204.96-9,415.29

Finding the Fourth Proportional to 28,135.15, 42,204.96 and 9,415.29

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Solution

The fourth proportional to 28,135.15, 42,204.96 and 9,415.29 is: 14,123.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,135.15 : 42,204.96 = 9,415.29 : x
  2. Step 2: Convert to fraction form
    28,135.15/42,204.96 = 9,415.29/x
  3. Step 3: Cross multiply
    28,135.15x = 42,204.96 × 9,415.29
  4. Step 4: Simplify right side
    28,135.15x = 397,371,937.84
  5. Step 5: Solve for x
    x = 397,371,937.84/28,135.15
  6. Step 6: Final answer
    x = 14,123.68

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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.