Home / 13,290.30-19,931.85-6,720.30

Finding the Fourth Proportional to 13,290.30, 19,931.85 and 6,720.30

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Solution

The fourth proportional to 13,290.30, 19,931.85 and 6,720.30 is: 10,078.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.30 : 19,931.85 = 6,720.30 : x
  2. Step 2: Convert to fraction form
    13,290.30/19,931.85 = 6,720.30/x
  3. Step 3: Cross multiply
    13,290.30x = 19,931.85 × 6,720.30
  4. Step 4: Simplify right side
    13,290.30x = 133,948,011.56
  5. Step 5: Solve for x
    x = 133,948,011.56/13,290.30
  6. Step 6: Final answer
    x = 10,078.63

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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.