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Finding the Fourth Proportional to 21,904.70, 32,808.45 and 18,016.70

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Solution

The fourth proportional to 21,904.70, 32,808.45 and 18,016.70 is: 26,985.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,904.70 : 32,808.45 = 18,016.70 : x
  2. Step 2: Convert to fraction form
    21,904.70/32,808.45 = 18,016.70/x
  3. Step 3: Cross multiply
    21,904.70x = 32,808.45 × 18,016.70
  4. Step 4: Simplify right side
    21,904.70x = 591,100,001.12
  5. Step 5: Solve for x
    x = 591,100,001.12/21,904.70
  6. Step 6: Final answer
    x = 26,985.08

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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.