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Finding the Fourth Proportional to 12,280.60, 18,423.60 and 5,705.20

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Solution

The fourth proportional to 12,280.60, 18,423.60 and 5,705.20 is: 8,559.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,280.60 : 18,423.60 = 5,705.20 : x
  2. Step 2: Convert to fraction form
    12,280.60/18,423.60 = 5,705.20/x
  3. Step 3: Cross multiply
    12,280.60x = 18,423.60 × 5,705.20
  4. Step 4: Simplify right side
    12,280.60x = 105,110,322.72
  5. Step 5: Solve for x
    x = 105,110,322.72/12,280.60
  6. Step 6: Final answer
    x = 8,559.05

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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.