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Finding the Fourth Proportional to 15,903.64, 21,960.93 and 9,945.46

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Solution

The fourth proportional to 15,903.64, 21,960.93 and 9,945.46 is: 13,733.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,903.64 : 21,960.93 = 9,945.46 : x
  2. Step 2: Convert to fraction form
    15,903.64/21,960.93 = 9,945.46/x
  3. Step 3: Cross multiply
    15,903.64x = 21,960.93 × 9,945.46
  4. Step 4: Simplify right side
    15,903.64x = 218,411,550.88
  5. Step 5: Solve for x
    x = 218,411,550.88/15,903.64
  6. Step 6: Final answer
    x = 13,733.43

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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.