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Finding the Fourth Proportional to 13,989.98, 19,300.11 and 8,020.28

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Solution

The fourth proportional to 13,989.98, 19,300.11 and 8,020.28 is: 11,064.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,989.98 : 19,300.11 = 8,020.28 : x
  2. Step 2: Convert to fraction form
    13,989.98/19,300.11 = 8,020.28/x
  3. Step 3: Cross multiply
    13,989.98x = 19,300.11 × 8,020.28
  4. Step 4: Simplify right side
    13,989.98x = 154,792,304.41
  5. Step 5: Solve for x
    x = 154,792,304.41/13,989.98
  6. Step 6: Final answer
    x = 11,064.51

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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.