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Finding the Fourth Proportional to 20,482.10, 30,723.15 and 12,706.10

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Solution

The fourth proportional to 20,482.10, 30,723.15 and 12,706.10 is: 19,059.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,482.10 : 30,723.15 = 12,706.10 : x
  2. Step 2: Convert to fraction form
    20,482.10/30,723.15 = 12,706.10/x
  3. Step 3: Cross multiply
    20,482.10x = 30,723.15 × 12,706.10
  4. Step 4: Simplify right side
    20,482.10x = 390,371,416.22
  5. Step 5: Solve for x
    x = 390,371,416.22/20,482.10
  6. Step 6: Final answer
    x = 19,059.15

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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.