Home / 20,130.50-30,162.87-12,235.43

Finding the Fourth Proportional to 20,130.50, 30,162.87 and 12,235.43

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Solution

The fourth proportional to 20,130.50, 30,162.87 and 12,235.43 is: 18,333.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,130.50 : 30,162.87 = 12,235.43 : x
  2. Step 2: Convert to fraction form
    20,130.50/30,162.87 = 12,235.43/x
  3. Step 3: Cross multiply
    20,130.50x = 30,162.87 × 12,235.43
  4. Step 4: Simplify right side
    20,130.50x = 369,055,623.31
  5. Step 5: Solve for x
    x = 369,055,623.31/20,130.50
  6. Step 6: Final answer
    x = 18,333.16

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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.