Home / 7,864.83-10,857.96-5,215.84

Finding the Fourth Proportional to 7,864.83, 10,857.96 and 5,215.84

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Solution

The fourth proportional to 7,864.83, 10,857.96 and 5,215.84 is: 7,200.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,864.83 : 10,857.96 = 5,215.84 : x
  2. Step 2: Convert to fraction form
    7,864.83/10,857.96 = 5,215.84/x
  3. Step 3: Cross multiply
    7,864.83x = 10,857.96 × 5,215.84
  4. Step 4: Simplify right side
    7,864.83x = 56,633,354.94
  5. Step 5: Solve for x
    x = 56,633,354.94/7,864.83
  6. Step 6: Final answer
    x = 7,200.84

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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.