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Finding the Fourth Proportional to 7,831.42, 10,801.08 and 6,885.20

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Solution

The fourth proportional to 7,831.42, 10,801.08 and 6,885.20 is: 9,496.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,831.42 : 10,801.08 = 6,885.20 : x
  2. Step 2: Convert to fraction form
    7,831.42/10,801.08 = 6,885.20/x
  3. Step 3: Cross multiply
    7,831.42x = 10,801.08 × 6,885.20
  4. Step 4: Simplify right side
    7,831.42x = 74,367,596.02
  5. Step 5: Solve for x
    x = 74,367,596.02/7,831.42
  6. Step 6: Final answer
    x = 9,496.06

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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.