Home / 21,268.45-31,870.34-10,159.84

Finding the Fourth Proportional to 21,268.45, 31,870.34 and 10,159.84

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Solution

The fourth proportional to 21,268.45, 31,870.34 and 10,159.84 is: 15,224.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,268.45 : 31,870.34 = 10,159.84 : x
  2. Step 2: Convert to fraction form
    21,268.45/31,870.34 = 10,159.84/x
  3. Step 3: Cross multiply
    21,268.45x = 31,870.34 × 10,159.84
  4. Step 4: Simplify right side
    21,268.45x = 323,797,424.67
  5. Step 5: Solve for x
    x = 323,797,424.67/21,268.45
  6. Step 6: Final answer
    x = 15,224.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.