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Finding the Fourth Proportional to 7,405.88, 10,209.42 and 5,831.16

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Solution

The fourth proportional to 7,405.88, 10,209.42 and 5,831.16 is: 8,038.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,405.88 : 10,209.42 = 5,831.16 : x
  2. Step 2: Convert to fraction form
    7,405.88/10,209.42 = 5,831.16/x
  3. Step 3: Cross multiply
    7,405.88x = 10,209.42 × 5,831.16
  4. Step 4: Simplify right side
    7,405.88x = 59,532,761.53
  5. Step 5: Solve for x
    x = 59,532,761.53/7,405.88
  6. Step 6: Final answer
    x = 8,038.58

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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.