Home / 20,476.86-30,715.28-5,685.78

Finding the Fourth Proportional to 20,476.86, 30,715.28 and 5,685.78

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Solution

The fourth proportional to 20,476.86, 30,715.28 and 5,685.78 is: 8,528.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,476.86 : 30,715.28 = 5,685.78 : x
  2. Step 2: Convert to fraction form
    20,476.86/30,715.28 = 5,685.78/x
  3. Step 3: Cross multiply
    20,476.86x = 30,715.28 × 5,685.78
  4. Step 4: Simplify right side
    20,476.86x = 174,640,142.71
  5. Step 5: Solve for x
    x = 174,640,142.71/20,476.86
  6. Step 6: Final answer
    x = 8,528.66

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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.