Home / 21,006.35-28,988.74-11,574.92

Finding the Fourth Proportional to 21,006.35, 28,988.74 and 11,574.92

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Solution

The fourth proportional to 21,006.35, 28,988.74 and 11,574.92 is: 15,973.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006.35 : 28,988.74 = 11,574.92 : x
  2. Step 2: Convert to fraction form
    21,006.35/28,988.74 = 11,574.92/x
  3. Step 3: Cross multiply
    21,006.35x = 28,988.74 × 11,574.92
  4. Step 4: Simplify right side
    21,006.35x = 335,542,205.17
  5. Step 5: Solve for x
    x = 335,542,205.17/21,006.35
  6. Step 6: Final answer
    x = 15,973.37

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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.