Home / 30,131.78-45,197.69-12,359.16

Finding the Fourth Proportional to 30,131.78, 45,197.69 and 12,359.16

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Solution

The fourth proportional to 30,131.78, 45,197.69 and 12,359.16 is: 18,538.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,131.78 : 45,197.69 = 12,359.16 : x
  2. Step 2: Convert to fraction form
    30,131.78/45,197.69 = 12,359.16/x
  3. Step 3: Cross multiply
    30,131.78x = 45,197.69 × 12,359.16
  4. Step 4: Simplify right side
    30,131.78x = 558,605,420.54
  5. Step 5: Solve for x
    x = 558,605,420.54/30,131.78
  6. Step 6: Final answer
    x = 18,538.75

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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.