Home / 13,490.90-20,238.18-12,670.76

Finding the Fourth Proportional to 13,490.90, 20,238.18 and 12,670.76

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Solution

The fourth proportional to 13,490.90, 20,238.18 and 12,670.76 is: 19,007.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,490.90 : 20,238.18 = 12,670.76 : x
  2. Step 2: Convert to fraction form
    13,490.90/20,238.18 = 12,670.76/x
  3. Step 3: Cross multiply
    13,490.90x = 20,238.18 × 12,670.76
  4. Step 4: Simplify right side
    13,490.90x = 256,433,121.62
  5. Step 5: Solve for x
    x = 256,433,121.62/13,490.90
  6. Step 6: Final answer
    x = 19,007.86

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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.