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Finding the Fourth Proportional to 20,242.68, 30,366.58 and 7,929.08

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Solution

The fourth proportional to 20,242.68, 30,366.58 and 7,929.08 is: 11,894.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,242.68 : 30,366.58 = 7,929.08 : x
  2. Step 2: Convert to fraction form
    20,242.68/30,366.58 = 7,929.08/x
  3. Step 3: Cross multiply
    20,242.68x = 30,366.58 × 7,929.08
  4. Step 4: Simplify right side
    20,242.68x = 240,779,042.15
  5. Step 5: Solve for x
    x = 240,779,042.15/20,242.68
  6. Step 6: Final answer
    x = 11,894.62

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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.