Home / 20,960.04-31,439.40-7,812.54

Finding the Fourth Proportional to 20,960.04, 31,439.40 and 7,812.54

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Solution

The fourth proportional to 20,960.04, 31,439.40 and 7,812.54 is: 11,718.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.04 : 31,439.40 = 7,812.54 : x
  2. Step 2: Convert to fraction form
    20,960.04/31,439.40 = 7,812.54/x
  3. Step 3: Cross multiply
    20,960.04x = 31,439.40 × 7,812.54
  4. Step 4: Simplify right side
    20,960.04x = 245,621,570.08
  5. Step 5: Solve for x
    x = 245,621,570.08/20,960.04
  6. Step 6: Final answer
    x = 11,718.56

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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.