Home / 20,130.21-30,179.43-12,719.03

Finding the Fourth Proportional to 20,130.21, 30,179.43 and 12,719.03

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Solution

The fourth proportional to 20,130.21, 30,179.43 and 12,719.03 is: 19,068.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,130.21 : 30,179.43 = 12,719.03 : x
  2. Step 2: Convert to fraction form
    20,130.21/30,179.43 = 12,719.03/x
  3. Step 3: Cross multiply
    20,130.21x = 30,179.43 × 12,719.03
  4. Step 4: Simplify right side
    20,130.21x = 383,852,924.66
  5. Step 5: Solve for x
    x = 383,852,924.66/20,130.21
  6. Step 6: Final answer
    x = 19,068.50

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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.