Home / 7,121.66-10,688.15-4,004.78

Finding the Fourth Proportional to 7,121.66, 10,688.15 and 4,004.78

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Solution

The fourth proportional to 7,121.66, 10,688.15 and 4,004.78 is: 6,010.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.66 : 10,688.15 = 4,004.78 : x
  2. Step 2: Convert to fraction form
    7,121.66/10,688.15 = 4,004.78/x
  3. Step 3: Cross multiply
    7,121.66x = 10,688.15 × 4,004.78
  4. Step 4: Simplify right side
    7,121.66x = 42,803,645.93
  5. Step 5: Solve for x
    x = 42,803,645.93/7,121.66
  6. Step 6: Final answer
    x = 6,010.35

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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.