Home / 21,005.73-28,989.90-12,055.23

Finding the Fourth Proportional to 21,005.73, 28,989.90 and 12,055.23

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Solution

The fourth proportional to 21,005.73, 28,989.90 and 12,055.23 is: 16,637.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.73 : 28,989.90 = 12,055.23 : x
  2. Step 2: Convert to fraction form
    21,005.73/28,989.90 = 12,055.23/x
  3. Step 3: Cross multiply
    21,005.73x = 28,989.90 × 12,055.23
  4. Step 4: Simplify right side
    21,005.73x = 349,479,912.18
  5. Step 5: Solve for x
    x = 349,479,912.18/21,005.73
  6. Step 6: Final answer
    x = 16,637.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.