Home / 30,131.20-45,188.70-12,597.40

Finding the Fourth Proportional to 30,131.20, 45,188.70 and 12,597.40

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Solution

The fourth proportional to 30,131.20, 45,188.70 and 12,597.40 is: 18,892.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,131.20 : 45,188.70 = 12,597.40 : x
  2. Step 2: Convert to fraction form
    30,131.20/45,188.70 = 12,597.40/x
  3. Step 3: Cross multiply
    30,131.20x = 45,188.70 × 12,597.40
  4. Step 4: Simplify right side
    30,131.20x = 569,260,129.38
  5. Step 5: Solve for x
    x = 569,260,129.38/30,131.20
  6. Step 6: Final answer
    x = 18,892.71

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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.