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Finding the Fourth Proportional to 20,492.10, 30,700.35 and 11,700.90

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Solution

The fourth proportional to 20,492.10, 30,700.35 and 11,700.90 is: 17,529.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,492.10 : 30,700.35 = 11,700.90 : x
  2. Step 2: Convert to fraction form
    20,492.10/30,700.35 = 11,700.90/x
  3. Step 3: Cross multiply
    20,492.10x = 30,700.35 × 11,700.90
  4. Step 4: Simplify right side
    20,492.10x = 359,221,725.32
  5. Step 5: Solve for x
    x = 359,221,725.32/20,492.10
  6. Step 6: Final answer
    x = 17,529.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.