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Finding the Fourth Proportional to 36,139.60, 54,209.40 and 12,768.40

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Solution

The fourth proportional to 36,139.60, 54,209.40 and 12,768.40 is: 19,152.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,139.60 : 54,209.40 = 12,768.40 : x
  2. Step 2: Convert to fraction form
    36,139.60/54,209.40 = 12,768.40/x
  3. Step 3: Cross multiply
    36,139.60x = 54,209.40 × 12,768.40
  4. Step 4: Simplify right side
    36,139.60x = 692,167,302.96
  5. Step 5: Solve for x
    x = 692,167,302.96/36,139.60
  6. Step 6: Final answer
    x = 19,152.60

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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.