Home / 20,512.15-28,307.13-12,020.38

Finding the Fourth Proportional to 20,512.15, 28,307.13 and 12,020.38

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Solution

The fourth proportional to 20,512.15, 28,307.13 and 12,020.38 is: 16,588.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,512.15 : 28,307.13 = 12,020.38 : x
  2. Step 2: Convert to fraction form
    20,512.15/28,307.13 = 12,020.38/x
  3. Step 3: Cross multiply
    20,512.15x = 28,307.13 × 12,020.38
  4. Step 4: Simplify right side
    20,512.15x = 340,262,459.31
  5. Step 5: Solve for x
    x = 340,262,459.31/20,512.15
  6. Step 6: Final answer
    x = 16,588.34

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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.