Home / 20,312.88-28,026.72-12,760.44

Finding the Fourth Proportional to 20,312.88, 28,026.72 and 12,760.44

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Solution

The fourth proportional to 20,312.88, 28,026.72 and 12,760.44 is: 17,606.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,312.88 : 28,026.72 = 12,760.44 : x
  2. Step 2: Convert to fraction form
    20,312.88/28,026.72 = 12,760.44/x
  3. Step 3: Cross multiply
    20,312.88x = 28,026.72 × 12,760.44
  4. Step 4: Simplify right side
    20,312.88x = 357,633,278.96
  5. Step 5: Solve for x
    x = 357,633,278.96/20,312.88
  6. Step 6: Final answer
    x = 17,606.23

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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.