Home / 20,123.12-30,180.36-12,623.06

Finding the Fourth Proportional to 20,123.12, 30,180.36 and 12,623.06

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Solution

The fourth proportional to 20,123.12, 30,180.36 and 12,623.06 is: 18,931.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.12 : 30,180.36 = 12,623.06 : x
  2. Step 2: Convert to fraction form
    20,123.12/30,180.36 = 12,623.06/x
  3. Step 3: Cross multiply
    20,123.12x = 30,180.36 × 12,623.06
  4. Step 4: Simplify right side
    20,123.12x = 380,968,617.89
  5. Step 5: Solve for x
    x = 380,968,617.89/20,123.12
  6. Step 6: Final answer
    x = 18,931.88

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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.