Home / 28,178.04-42,255.54-9,705.72

Finding the Fourth Proportional to 28,178.04, 42,255.54 and 9,705.72

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Solution

The fourth proportional to 28,178.04, 42,255.54 and 9,705.72 is: 14,554.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,178.04 : 42,255.54 = 9,705.72 : x
  2. Step 2: Convert to fraction form
    28,178.04/42,255.54 = 9,705.72/x
  3. Step 3: Cross multiply
    28,178.04x = 42,255.54 × 9,705.72
  4. Step 4: Simplify right side
    28,178.04x = 410,120,439.69
  5. Step 5: Solve for x
    x = 410,120,439.69/28,178.04
  6. Step 6: Final answer
    x = 14,554.61

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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.