Home / 19,170.30-28,725.55-12,135.45

Finding the Fourth Proportional to 19,170.30, 28,725.55 and 12,135.45

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Solution

The fourth proportional to 19,170.30, 28,725.55 and 12,135.45 is: 18,184.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,170.30 : 28,725.55 = 12,135.45 : x
  2. Step 2: Convert to fraction form
    19,170.30/28,725.55 = 12,135.45/x
  3. Step 3: Cross multiply
    19,170.30x = 28,725.55 × 12,135.45
  4. Step 4: Simplify right side
    19,170.30x = 348,597,475.75
  5. Step 5: Solve for x
    x = 348,597,475.75/19,170.30
  6. Step 6: Final answer
    x = 18,184.25

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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.