Home / 7,145.76-10,708.88-5,389.28

Finding the Fourth Proportional to 7,145.76, 10,708.88 and 5,389.28

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Solution

The fourth proportional to 7,145.76, 10,708.88 and 5,389.28 is: 8,076.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,145.76 : 10,708.88 = 5,389.28 : x
  2. Step 2: Convert to fraction form
    7,145.76/10,708.88 = 5,389.28/x
  3. Step 3: Cross multiply
    7,145.76x = 10,708.88 × 5,389.28
  4. Step 4: Simplify right side
    7,145.76x = 57,713,152.81
  5. Step 5: Solve for x
    x = 57,713,152.81/7,145.76
  6. Step 6: Final answer
    x = 8,076.56

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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.