Home / 20,921.58-28,873.62-11,492.10

Finding the Fourth Proportional to 20,921.58, 28,873.62 and 11,492.10

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Solution

The fourth proportional to 20,921.58, 28,873.62 and 11,492.10 is: 15,860.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.58 : 28,873.62 = 11,492.10 : x
  2. Step 2: Convert to fraction form
    20,921.58/28,873.62 = 11,492.10/x
  3. Step 3: Cross multiply
    20,921.58x = 28,873.62 × 11,492.10
  4. Step 4: Simplify right side
    20,921.58x = 331,818,528.40
  5. Step 5: Solve for x
    x = 331,818,528.40/20,921.58
  6. Step 6: Final answer
    x = 15,860.11

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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.