Home / 5,384.81-7,430.38-3,145.06

Finding the Fourth Proportional to 5,384.81, 7,430.38 and 3,145.06

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Solution

The fourth proportional to 5,384.81, 7,430.38 and 3,145.06 is: 4,339.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,384.81 : 7,430.38 = 3,145.06 : x
  2. Step 2: Convert to fraction form
    5,384.81/7,430.38 = 3,145.06/x
  3. Step 3: Cross multiply
    5,384.81x = 7,430.38 × 3,145.06
  4. Step 4: Simplify right side
    5,384.81x = 23,368,990.92
  5. Step 5: Solve for x
    x = 23,368,990.92/5,384.81
  6. Step 6: Final answer
    x = 4,339.80

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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.