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Finding the Fourth Proportional to 14,355.20, 21,484.20 and 12,605.60

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Solution

The fourth proportional to 14,355.20, 21,484.20 and 12,605.60 is: 18,865.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,355.20 : 21,484.20 = 12,605.60 : x
  2. Step 2: Convert to fraction form
    14,355.20/21,484.20 = 12,605.60/x
  3. Step 3: Cross multiply
    14,355.20x = 21,484.20 × 12,605.60
  4. Step 4: Simplify right side
    14,355.20x = 270,821,231.52
  5. Step 5: Solve for x
    x = 270,821,231.52/14,355.20
  6. Step 6: Final answer
    x = 18,865.72

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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.