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Finding the Fourth Proportional to 28,119.84, 38,808.48 and 17,918.16

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Solution

The fourth proportional to 28,119.84, 38,808.48 and 17,918.16 is: 24,729.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,119.84 : 38,808.48 = 17,918.16 : x
  2. Step 2: Convert to fraction form
    28,119.84/38,808.48 = 17,918.16/x
  3. Step 3: Cross multiply
    28,119.84x = 38,808.48 × 17,918.16
  4. Step 4: Simplify right side
    28,119.84x = 695,376,554.00
  5. Step 5: Solve for x
    x = 695,376,554.00/28,119.84
  6. Step 6: Final answer
    x = 24,729.04

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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.