Home / 20,581.61-30,869.18-6,539.78

Finding the Fourth Proportional to 20,581.61, 30,869.18 and 6,539.78

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Solution

The fourth proportional to 20,581.61, 30,869.18 and 6,539.78 is: 9,808.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.61 : 30,869.18 = 6,539.78 : x
  2. Step 2: Convert to fraction form
    20,581.61/30,869.18 = 6,539.78/x
  3. Step 3: Cross multiply
    20,581.61x = 30,869.18 × 6,539.78
  4. Step 4: Simplify right side
    20,581.61x = 201,877,690.45
  5. Step 5: Solve for x
    x = 201,877,690.45/20,581.61
  6. Step 6: Final answer
    x = 9,808.65

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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.