Home / 21,006.08-28,989.68-11,574.64

Finding the Fourth Proportional to 21,006.08, 28,989.68 and 11,574.64

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Solution

The fourth proportional to 21,006.08, 28,989.68 and 11,574.64 is: 15,973.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006.08 : 28,989.68 = 11,574.64 : x
  2. Step 2: Convert to fraction form
    21,006.08/28,989.68 = 11,574.64/x
  3. Step 3: Cross multiply
    21,006.08x = 28,989.68 × 11,574.64
  4. Step 4: Simplify right side
    21,006.08x = 335,545,109.72
  5. Step 5: Solve for x
    x = 335,545,109.72/21,006.08
  6. Step 6: Final answer
    x = 15,973.71

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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.