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Finding the Fourth Proportional to 21,988.04, 32,988.78 and 6,994.28

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Solution

The fourth proportional to 21,988.04, 32,988.78 and 6,994.28 is: 10,493.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,988.04 : 32,988.78 = 6,994.28 : x
  2. Step 2: Convert to fraction form
    21,988.04/32,988.78 = 6,994.28/x
  3. Step 3: Cross multiply
    21,988.04x = 32,988.78 × 6,994.28
  4. Step 4: Simplify right side
    21,988.04x = 230,732,764.18
  5. Step 5: Solve for x
    x = 230,732,764.18/21,988.04
  6. Step 6: Final answer
    x = 10,493.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.