Home / 7,215.28-10,821.70-2,538.74

Finding the Fourth Proportional to 7,215.28, 10,821.70 and 2,538.74

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Solution

The fourth proportional to 7,215.28, 10,821.70 and 2,538.74 is: 3,807.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,215.28 : 10,821.70 = 2,538.74 : x
  2. Step 2: Convert to fraction form
    7,215.28/10,821.70 = 2,538.74/x
  3. Step 3: Cross multiply
    7,215.28x = 10,821.70 × 2,538.74
  4. Step 4: Simplify right side
    7,215.28x = 27,473,512.89
  5. Step 5: Solve for x
    x = 27,473,512.89/7,215.28
  6. Step 6: Final answer
    x = 3,807.69

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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.