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Finding the Fourth Proportional to 18,759.60, 28,139.40 and 14,612.40

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Solution

The fourth proportional to 18,759.60, 28,139.40 and 14,612.40 is: 21,918.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,759.60 : 28,139.40 = 14,612.40 : x
  2. Step 2: Convert to fraction form
    18,759.60/28,139.40 = 14,612.40/x
  3. Step 3: Cross multiply
    18,759.60x = 28,139.40 × 14,612.40
  4. Step 4: Simplify right side
    18,759.60x = 411,184,168.56
  5. Step 5: Solve for x
    x = 411,184,168.56/18,759.60
  6. Step 6: Final answer
    x = 21,918.60

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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.