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Finding the Fourth Proportional to 19,135.60, 28,703.40 and 18,228.40

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Solution

The fourth proportional to 19,135.60, 28,703.40 and 18,228.40 is: 27,342.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,135.60 : 28,703.40 = 18,228.40 : x
  2. Step 2: Convert to fraction form
    19,135.60/28,703.40 = 18,228.40/x
  3. Step 3: Cross multiply
    19,135.60x = 28,703.40 × 18,228.40
  4. Step 4: Simplify right side
    19,135.60x = 523,217,056.56
  5. Step 5: Solve for x
    x = 523,217,056.56/19,135.60
  6. Step 6: Final answer
    x = 27,342.60

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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.