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Finding the Fourth Proportional to 20,569.68, 30,860.10 and 6,718.68

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Solution

The fourth proportional to 20,569.68, 30,860.10 and 6,718.68 is: 10,079.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,569.68 : 30,860.10 = 6,718.68 : x
  2. Step 2: Convert to fraction form
    20,569.68/30,860.10 = 6,718.68/x
  3. Step 3: Cross multiply
    20,569.68x = 30,860.10 × 6,718.68
  4. Step 4: Simplify right side
    20,569.68x = 207,339,136.67
  5. Step 5: Solve for x
    x = 207,339,136.67/20,569.68
  6. Step 6: Final answer
    x = 10,079.84

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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.