Home / 30,191.70-45,269.55-18,513.30

Finding the Fourth Proportional to 30,191.70, 45,269.55 and 18,513.30

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Solution

The fourth proportional to 30,191.70, 45,269.55 and 18,513.30 is: 27,758.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,191.70 : 45,269.55 = 18,513.30 : x
  2. Step 2: Convert to fraction form
    30,191.70/45,269.55 = 18,513.30/x
  3. Step 3: Cross multiply
    30,191.70x = 45,269.55 × 18,513.30
  4. Step 4: Simplify right side
    30,191.70x = 838,088,760.02
  5. Step 5: Solve for x
    x = 838,088,760.02/30,191.70
  6. Step 6: Final answer
    x = 27,758.91

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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.