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Finding the Fourth Proportional to 15,693.03, 21,655.80 and 8,619.03

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Solution

The fourth proportional to 15,693.03, 21,655.80 and 8,619.03 is: 11,893.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,693.03 : 21,655.80 = 8,619.03 : x
  2. Step 2: Convert to fraction form
    15,693.03/21,655.80 = 8,619.03/x
  3. Step 3: Cross multiply
    15,693.03x = 21,655.80 × 8,619.03
  4. Step 4: Simplify right side
    15,693.03x = 186,651,989.87
  5. Step 5: Solve for x
    x = 186,651,989.87/15,693.03
  6. Step 6: Final answer
    x = 11,893.94

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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.