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Finding the Fourth Proportional to 15,039.71, 20,764.22 and 9,664.32

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Solution

The fourth proportional to 15,039.71, 20,764.22 and 9,664.32 is: 13,342.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,039.71 : 20,764.22 = 9,664.32 : x
  2. Step 2: Convert to fraction form
    15,039.71/20,764.22 = 9,664.32/x
  3. Step 3: Cross multiply
    15,039.71x = 20,764.22 × 9,664.32
  4. Step 4: Simplify right side
    15,039.71x = 200,672,066.63
  5. Step 5: Solve for x
    x = 200,672,066.63/15,039.71
  6. Step 6: Final answer
    x = 13,342.81

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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.