Home / 20,837.57-28,748.69-11,878.59

Finding the Fourth Proportional to 20,837.57, 28,748.69 and 11,878.59

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Solution

The fourth proportional to 20,837.57, 28,748.69 and 11,878.59 is: 16,388.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,837.57 : 28,748.69 = 11,878.59 : x
  2. Step 2: Convert to fraction form
    20,837.57/28,748.69 = 11,878.59/x
  3. Step 3: Cross multiply
    20,837.57x = 28,748.69 × 11,878.59
  4. Step 4: Simplify right side
    20,837.57x = 341,493,931.24
  5. Step 5: Solve for x
    x = 341,493,931.24/20,837.57
  6. Step 6: Final answer
    x = 16,388.38

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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.