Home / 20,427.28-30,606.30-12,513.24

Finding the Fourth Proportional to 20,427.28, 30,606.30 and 12,513.24

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Solution

The fourth proportional to 20,427.28, 30,606.30 and 12,513.24 is: 18,748.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,427.28 : 30,606.30 = 12,513.24 : x
  2. Step 2: Convert to fraction form
    20,427.28/30,606.30 = 12,513.24/x
  3. Step 3: Cross multiply
    20,427.28x = 30,606.30 × 12,513.24
  4. Step 4: Simplify right side
    20,427.28x = 382,983,977.41
  5. Step 5: Solve for x
    x = 382,983,977.41/20,427.28
  6. Step 6: Final answer
    x = 18,748.65

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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.