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Finding the Fourth Proportional to 15,867.01, 21,895.54 and 8,695.52

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Solution

The fourth proportional to 15,867.01, 21,895.54 and 8,695.52 is: 11,999.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,867.01 : 21,895.54 = 8,695.52 : x
  2. Step 2: Convert to fraction form
    15,867.01/21,895.54 = 8,695.52/x
  3. Step 3: Cross multiply
    15,867.01x = 21,895.54 × 8,695.52
  4. Step 4: Simplify right side
    15,867.01x = 190,393,105.98
  5. Step 5: Solve for x
    x = 190,393,105.98/15,867.01
  6. Step 6: Final answer
    x = 11,999.31

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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.