Home / 20,837.30-28,748.35-11,878.34

Finding the Fourth Proportional to 20,837.30, 28,748.35 and 11,878.34

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Solution

The fourth proportional to 20,837.30, 28,748.35 and 11,878.34 is: 16,388.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,837.30 : 28,748.35 = 11,878.34 : x
  2. Step 2: Convert to fraction form
    20,837.30/28,748.35 = 11,878.34/x
  3. Step 3: Cross multiply
    20,837.30x = 28,748.35 × 11,878.34
  4. Step 4: Simplify right side
    20,837.30x = 341,482,675.74
  5. Step 5: Solve for x
    x = 341,482,675.74/20,837.30
  6. Step 6: Final answer
    x = 16,388.05

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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.