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Finding the Fourth Proportional to 21,805.69, 32,713.80 and 7,015.99

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Solution

The fourth proportional to 21,805.69, 32,713.80 and 7,015.99 is: 10,525.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,805.69 : 32,713.80 = 7,015.99 : x
  2. Step 2: Convert to fraction form
    21,805.69/32,713.80 = 7,015.99/x
  3. Step 3: Cross multiply
    21,805.69x = 32,713.80 × 7,015.99
  4. Step 4: Simplify right side
    21,805.69x = 229,519,693.66
  5. Step 5: Solve for x
    x = 229,519,693.66/21,805.69
  6. Step 6: Final answer
    x = 10,525.68

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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.