Home / 20,655.50-30,985.12-6,615.90

Finding the Fourth Proportional to 20,655.50, 30,985.12 and 6,615.90

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Solution

The fourth proportional to 20,655.50, 30,985.12 and 6,615.90 is: 9,924.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,655.50 : 30,985.12 = 6,615.90 : x
  2. Step 2: Convert to fraction form
    20,655.50/30,985.12 = 6,615.90/x
  3. Step 3: Cross multiply
    20,655.50x = 30,985.12 × 6,615.90
  4. Step 4: Simplify right side
    20,655.50x = 204,994,455.41
  5. Step 5: Solve for x
    x = 204,994,455.41/20,655.50
  6. Step 6: Final answer
    x = 9,924.45

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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.