Home / 20,655.59-28,507.10-12,272.09

Finding the Fourth Proportional to 20,655.59, 28,507.10 and 12,272.09

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Solution

The fourth proportional to 20,655.59, 28,507.10 and 12,272.09 is: 16,936.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,655.59 : 28,507.10 = 12,272.09 : x
  2. Step 2: Convert to fraction form
    20,655.59/28,507.10 = 12,272.09/x
  3. Step 3: Cross multiply
    20,655.59x = 28,507.10 × 12,272.09
  4. Step 4: Simplify right side
    20,655.59x = 349,841,492.94
  5. Step 5: Solve for x
    x = 349,841,492.94/20,655.59
  6. Step 6: Final answer
    x = 16,936.90

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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.