Home / 21,009.42-28,993.01-11,577.98

Finding the Fourth Proportional to 21,009.42, 28,993.01 and 11,577.98

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Solution

The fourth proportional to 21,009.42, 28,993.01 and 11,577.98 is: 15,977.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.42 : 28,993.01 = 11,577.98 : x
  2. Step 2: Convert to fraction form
    21,009.42/28,993.01 = 11,577.98/x
  3. Step 3: Cross multiply
    21,009.42x = 28,993.01 × 11,577.98
  4. Step 4: Simplify right side
    21,009.42x = 335,680,504.51
  5. Step 5: Solve for x
    x = 335,680,504.51/21,009.42
  6. Step 6: Final answer
    x = 15,977.62

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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.