Home / 21,780.72-32,669.30-6,985.66

Finding the Fourth Proportional to 21,780.72, 32,669.30 and 6,985.66

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Solution

The fourth proportional to 21,780.72, 32,669.30 and 6,985.66 is: 10,477.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.72 : 32,669.30 = 6,985.66 : x
  2. Step 2: Convert to fraction form
    21,780.72/32,669.30 = 6,985.66/x
  3. Step 3: Cross multiply
    21,780.72x = 32,669.30 × 6,985.66
  4. Step 4: Simplify right side
    21,780.72x = 228,216,622.24
  5. Step 5: Solve for x
    x = 228,216,622.24/21,780.72
  6. Step 6: Final answer
    x = 10,477.92

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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.