Home / 7,120.65-9,812.62-5,127.45

Finding the Fourth Proportional to 7,120.65, 9,812.62 and 5,127.45

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Solution

The fourth proportional to 7,120.65, 9,812.62 and 5,127.45 is: 7,065.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.65 : 9,812.62 = 5,127.45 : x
  2. Step 2: Convert to fraction form
    7,120.65/9,812.62 = 5,127.45/x
  3. Step 3: Cross multiply
    7,120.65x = 9,812.62 × 5,127.45
  4. Step 4: Simplify right side
    7,120.65x = 50,313,688.03
  5. Step 5: Solve for x
    x = 50,313,688.03/7,120.65
  6. Step 6: Final answer
    x = 7,065.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.