Home / 20,928.72-31,378.50-13,026.36

Finding the Fourth Proportional to 20,928.72, 31,378.50 and 13,026.36

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Solution

The fourth proportional to 20,928.72, 31,378.50 and 13,026.36 is: 19,530.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.72 : 31,378.50 = 13,026.36 : x
  2. Step 2: Convert to fraction form
    20,928.72/31,378.50 = 13,026.36/x
  3. Step 3: Cross multiply
    20,928.72x = 31,378.50 × 13,026.36
  4. Step 4: Simplify right side
    20,928.72x = 408,747,637.26
  5. Step 5: Solve for x
    x = 408,747,637.26/20,928.72
  6. Step 6: Final answer
    x = 19,530.47

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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.