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Finding the Fourth Proportional to 6,921.37, 10,332.20 and 6,429.30

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Solution

The fourth proportional to 6,921.37, 10,332.20 and 6,429.30 is: 9,597.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,921.37 : 10,332.20 = 6,429.30 : x
  2. Step 2: Convert to fraction form
    6,921.37/10,332.20 = 6,429.30/x
  3. Step 3: Cross multiply
    6,921.37x = 10,332.20 × 6,429.30
  4. Step 4: Simplify right side
    6,921.37x = 66,428,813.46
  5. Step 5: Solve for x
    x = 66,428,813.46/6,921.37
  6. Step 6: Final answer
    x = 9,597.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.