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Finding the Fourth Proportional to 13,389.60, 20,084.40 and 12,077.40

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Solution

The fourth proportional to 13,389.60, 20,084.40 and 12,077.40 is: 18,116.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.60 : 20,084.40 = 12,077.40 : x
  2. Step 2: Convert to fraction form
    13,389.60/20,084.40 = 12,077.40/x
  3. Step 3: Cross multiply
    13,389.60x = 20,084.40 × 12,077.40
  4. Step 4: Simplify right side
    13,389.60x = 242,567,332.56
  5. Step 5: Solve for x
    x = 242,567,332.56/13,389.60
  6. Step 6: Final answer
    x = 18,116.10

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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.