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Finding the Fourth Proportional to 14,281.20, 21,423.40 and 4,420.40

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Solution

The fourth proportional to 14,281.20, 21,423.40 and 4,420.40 is: 6,631.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,281.20 : 21,423.40 = 4,420.40 : x
  2. Step 2: Convert to fraction form
    14,281.20/21,423.40 = 4,420.40/x
  3. Step 3: Cross multiply
    14,281.20x = 21,423.40 × 4,420.40
  4. Step 4: Simplify right side
    14,281.20x = 94,699,997.36
  5. Step 5: Solve for x
    x = 94,699,997.36/14,281.20
  6. Step 6: Final answer
    x = 6,631.10

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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.