Home / 21,007.02-28,990.26-12,943.38

Finding the Fourth Proportional to 21,007.02, 28,990.26 and 12,943.38

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Solution

The fourth proportional to 21,007.02, 28,990.26 and 12,943.38 is: 17,862.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.02 : 28,990.26 = 12,943.38 : x
  2. Step 2: Convert to fraction form
    21,007.02/28,990.26 = 12,943.38/x
  3. Step 3: Cross multiply
    21,007.02x = 28,990.26 × 12,943.38
  4. Step 4: Simplify right side
    21,007.02x = 375,231,951.48
  5. Step 5: Solve for x
    x = 375,231,951.48/21,007.02
  6. Step 6: Final answer
    x = 17,862.22

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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.