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Finding the Fourth Proportional to 14,420, 21,630 and 4,032.20

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Solution

The fourth proportional to 14,420, 21,630 and 4,032.20 is: 6,048.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,420 : 21,630 = 4,032.20 : x
  2. Step 2: Convert to fraction form
    14,420/21,630 = 4,032.20/x
  3. Step 3: Cross multiply
    14,420x = 21,630 × 4,032.20
  4. Step 4: Simplify right side
    14,420x = 87,216,486
  5. Step 5: Solve for x
    x = 87,216,486/14,420
  6. Step 6: Final answer
    x = 6,048.30

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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.