Home / 21,006.49-28,989.05-11,575.06

Finding the Fourth Proportional to 21,006.49, 28,989.05 and 11,575.06

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Solution

The fourth proportional to 21,006.49, 28,989.05 and 11,575.06 is: 15,973.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006.49 : 28,989.05 = 11,575.06 : x
  2. Step 2: Convert to fraction form
    21,006.49/28,989.05 = 11,575.06/x
  3. Step 3: Cross multiply
    21,006.49x = 28,989.05 × 11,575.06
  4. Step 4: Simplify right side
    21,006.49x = 335,549,993.09
  5. Step 5: Solve for x
    x = 335,549,993.09/21,006.49
  6. Step 6: Final answer
    x = 15,973.63

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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.