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Finding the Fourth Proportional to 15,804.81, 21,809.75 and 8,633.34

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Solution

The fourth proportional to 15,804.81, 21,809.75 and 8,633.34 is: 11,913.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,804.81 : 21,809.75 = 8,633.34 : x
  2. Step 2: Convert to fraction form
    15,804.81/21,809.75 = 8,633.34/x
  3. Step 3: Cross multiply
    15,804.81x = 21,809.75 × 8,633.34
  4. Step 4: Simplify right side
    15,804.81x = 188,290,943.90
  5. Step 5: Solve for x
    x = 188,290,943.90/15,804.81
  6. Step 6: Final answer
    x = 11,913.52

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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.