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Finding the Fourth Proportional to 21,777.73, 32,670.84 and 6,985.51

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Solution

The fourth proportional to 21,777.73, 32,670.84 and 6,985.51 is: 10,479.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,777.73 : 32,670.84 = 6,985.51 : x
  2. Step 2: Convert to fraction form
    21,777.73/32,670.84 = 6,985.51/x
  3. Step 3: Cross multiply
    21,777.73x = 32,670.84 × 6,985.51
  4. Step 4: Simplify right side
    21,777.73x = 228,222,424.05
  5. Step 5: Solve for x
    x = 228,222,424.05/21,777.73
  6. Step 6: Final answer
    x = 10,479.63

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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.