Home / 7,125.47-10,688.80-1,861.17

Finding the Fourth Proportional to 7,125.47, 10,688.80 and 1,861.17

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Solution

The fourth proportional to 7,125.47, 10,688.80 and 1,861.17 is: 2,791.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,125.47 : 10,688.80 = 1,861.17 : x
  2. Step 2: Convert to fraction form
    7,125.47/10,688.80 = 1,861.17/x
  3. Step 3: Cross multiply
    7,125.47x = 10,688.80 × 1,861.17
  4. Step 4: Simplify right side
    7,125.47x = 19,893,673.90
  5. Step 5: Solve for x
    x = 19,893,673.90/7,125.47
  6. Step 6: Final answer
    x = 2,791.91

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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.