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Finding the Fourth Proportional to 5,878.20, 8,831.70 and 4,420.20

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Solution

The fourth proportional to 5,878.20, 8,831.70 and 4,420.20 is: 6,641.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,878.20 : 8,831.70 = 4,420.20 : x
  2. Step 2: Convert to fraction form
    5,878.20/8,831.70 = 4,420.20/x
  3. Step 3: Cross multiply
    5,878.20x = 8,831.70 × 4,420.20
  4. Step 4: Simplify right side
    5,878.20x = 39,037,880.34
  5. Step 5: Solve for x
    x = 39,037,880.34/5,878.20
  6. Step 6: Final answer
    x = 6,641.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.