Home / 9,210.78-12,700.81-6,221.42

Finding the Fourth Proportional to 9,210.78, 12,700.81 and 6,221.42

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Solution

The fourth proportional to 9,210.78, 12,700.81 and 6,221.42 is: 8,578.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,210.78 : 12,700.81 = 6,221.42 : x
  2. Step 2: Convert to fraction form
    9,210.78/12,700.81 = 6,221.42/x
  3. Step 3: Cross multiply
    9,210.78x = 12,700.81 × 6,221.42
  4. Step 4: Simplify right side
    9,210.78x = 79,017,073.35
  5. Step 5: Solve for x
    x = 79,017,073.35/9,210.78
  6. Step 6: Final answer
    x = 8,578.76

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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.