Home / 21,008.73-28,991.67-11,448.69

Finding the Fourth Proportional to 21,008.73, 28,991.67 and 11,448.69

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Solution

The fourth proportional to 21,008.73, 28,991.67 and 11,448.69 is: 15,798.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.73 : 28,991.67 = 11,448.69 : x
  2. Step 2: Convert to fraction form
    21,008.73/28,991.67 = 11,448.69/x
  3. Step 3: Cross multiply
    21,008.73x = 28,991.67 × 11,448.69
  4. Step 4: Simplify right side
    21,008.73x = 331,916,642.41
  5. Step 5: Solve for x
    x = 331,916,642.41/21,008.73
  6. Step 6: Final answer
    x = 15,798.99

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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.