Home / 20,700.09-28,553.13-12,630.06

Finding the Fourth Proportional to 20,700.09, 28,553.13 and 12,630.06

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Solution

The fourth proportional to 20,700.09, 28,553.13 and 12,630.06 is: 17,421.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,700.09 : 28,553.13 = 12,630.06 : x
  2. Step 2: Convert to fraction form
    20,700.09/28,553.13 = 12,630.06/x
  3. Step 3: Cross multiply
    20,700.09x = 28,553.13 × 12,630.06
  4. Step 4: Simplify right side
    20,700.09x = 360,627,745.09
  5. Step 5: Solve for x
    x = 360,627,745.09/20,700.09
  6. Step 6: Final answer
    x = 17,421.55

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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.