Home / 20,655.96-28,507.68-12,272.40

Finding the Fourth Proportional to 20,655.96, 28,507.68 and 12,272.40

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Solution

The fourth proportional to 20,655.96, 28,507.68 and 12,272.40 is: 16,937.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,655.96 : 28,507.68 = 12,272.40 : x
  2. Step 2: Convert to fraction form
    20,655.96/28,507.68 = 12,272.40/x
  3. Step 3: Cross multiply
    20,655.96x = 28,507.68 × 12,272.40
  4. Step 4: Simplify right side
    20,655.96x = 349,857,652.03
  5. Step 5: Solve for x
    x = 349,857,652.03/20,655.96
  6. Step 6: Final answer
    x = 16,937.37

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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.