Home / 7,125.49-10,688.85-1,861.20

Finding the Fourth Proportional to 7,125.49, 10,688.85 and 1,861.20

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Solution

The fourth proportional to 7,125.49, 10,688.85 and 1,861.20 is: 2,791.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,125.49 : 10,688.85 = 1,861.20 : x
  2. Step 2: Convert to fraction form
    7,125.49/10,688.85 = 1,861.20/x
  3. Step 3: Cross multiply
    7,125.49x = 10,688.85 × 1,861.20
  4. Step 4: Simplify right side
    7,125.49x = 19,894,087.62
  5. Step 5: Solve for x
    x = 19,894,087.62/7,125.49
  6. Step 6: Final answer
    x = 2,791.96

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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.