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Finding the Fourth Proportional to 13,988.64, 19,305.99 and 8,020.29

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Solution

The fourth proportional to 13,988.64, 19,305.99 and 8,020.29 is: 11,068.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,988.64 : 19,305.99 = 8,020.29 : x
  2. Step 2: Convert to fraction form
    13,988.64/19,305.99 = 8,020.29/x
  3. Step 3: Cross multiply
    13,988.64x = 19,305.99 × 8,020.29
  4. Step 4: Simplify right side
    13,988.64x = 154,839,638.54
  5. Step 5: Solve for x
    x = 154,839,638.54/13,988.64
  6. Step 6: Final answer
    x = 11,068.96

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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.