Home / 20,434.21-28,191.04-12,878.53

Finding the Fourth Proportional to 20,434.21, 28,191.04 and 12,878.53

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Solution

The fourth proportional to 20,434.21, 28,191.04 and 12,878.53 is: 17,767.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,434.21 : 28,191.04 = 12,878.53 : x
  2. Step 2: Convert to fraction form
    20,434.21/28,191.04 = 12,878.53/x
  3. Step 3: Cross multiply
    20,434.21x = 28,191.04 × 12,878.53
  4. Step 4: Simplify right side
    20,434.21x = 363,059,154.37
  5. Step 5: Solve for x
    x = 363,059,154.37/20,434.21
  6. Step 6: Final answer
    x = 17,767.22

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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.