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Finding the Fourth Proportional to 15,900.94, 21,943.37 and 9,936.07

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Solution

The fourth proportional to 15,900.94, 21,943.37 and 9,936.07 is: 13,711.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,900.94 : 21,943.37 = 9,936.07 : x
  2. Step 2: Convert to fraction form
    15,900.94/21,943.37 = 9,936.07/x
  3. Step 3: Cross multiply
    15,900.94x = 21,943.37 × 9,936.07
  4. Step 4: Simplify right side
    15,900.94x = 218,030,830.34
  5. Step 5: Solve for x
    x = 218,030,830.34/15,900.94
  6. Step 6: Final answer
    x = 13,711.82

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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.