Home / 7,145.20-10,717.80-4,812.40

Finding the Fourth Proportional to 7,145.20, 10,717.80 and 4,812.40

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Solution

The fourth proportional to 7,145.20, 10,717.80 and 4,812.40 is: 7,218.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,145.20 : 10,717.80 = 4,812.40 : x
  2. Step 2: Convert to fraction form
    7,145.20/10,717.80 = 4,812.40/x
  3. Step 3: Cross multiply
    7,145.20x = 10,717.80 × 4,812.40
  4. Step 4: Simplify right side
    7,145.20x = 51,578,340.72
  5. Step 5: Solve for x
    x = 51,578,340.72/7,145.20
  6. Step 6: Final answer
    x = 7,218.60

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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.