Home / 7,128.87-10,618.13-6,809.05

Finding the Fourth Proportional to 7,128.87, 10,618.13 and 6,809.05

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Solution

The fourth proportional to 7,128.87, 10,618.13 and 6,809.05 is: 10,141.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.87 : 10,618.13 = 6,809.05 : x
  2. Step 2: Convert to fraction form
    7,128.87/10,618.13 = 6,809.05/x
  3. Step 3: Cross multiply
    7,128.87x = 10,618.13 × 6,809.05
  4. Step 4: Simplify right side
    7,128.87x = 72,299,378.08
  5. Step 5: Solve for x
    x = 72,299,378.08/7,128.87
  6. Step 6: Final answer
    x = 10,141.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.