Home / 19,390.40-26,743.20-12,318.56

Finding the Fourth Proportional to 19,390.40, 26,743.20 and 12,318.56

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Solution

The fourth proportional to 19,390.40, 26,743.20 and 12,318.56 is: 16,989.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,390.40 : 26,743.20 = 12,318.56 : x
  2. Step 2: Convert to fraction form
    19,390.40/26,743.20 = 12,318.56/x
  3. Step 3: Cross multiply
    19,390.40x = 26,743.20 × 12,318.56
  4. Step 4: Simplify right side
    19,390.40x = 329,437,713.79
  5. Step 5: Solve for x
    x = 329,437,713.79/19,390.40
  6. Step 6: Final answer
    x = 16,989.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.