Home / 7,530.78-10,392.45-4,218.78

Finding the Fourth Proportional to 7,530.78, 10,392.45 and 4,218.78

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Solution

The fourth proportional to 7,530.78, 10,392.45 and 4,218.78 is: 5,821.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,530.78 : 10,392.45 = 4,218.78 : x
  2. Step 2: Convert to fraction form
    7,530.78/10,392.45 = 4,218.78/x
  3. Step 3: Cross multiply
    7,530.78x = 10,392.45 × 4,218.78
  4. Step 4: Simplify right side
    7,530.78x = 43,843,460.21
  5. Step 5: Solve for x
    x = 43,843,460.21/7,530.78
  6. Step 6: Final answer
    x = 5,821.90

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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.