Home / 19,988.80-27,578.34-11,603.68

Finding the Fourth Proportional to 19,988.80, 27,578.34 and 11,603.68

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Solution

The fourth proportional to 19,988.80, 27,578.34 and 11,603.68 is: 16,009.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,988.80 : 27,578.34 = 11,603.68 : x
  2. Step 2: Convert to fraction form
    19,988.80/27,578.34 = 11,603.68/x
  3. Step 3: Cross multiply
    19,988.80x = 27,578.34 × 11,603.68
  4. Step 4: Simplify right side
    19,988.80x = 320,010,232.29
  5. Step 5: Solve for x
    x = 320,010,232.29/19,988.80
  6. Step 6: Final answer
    x = 16,009.48

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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.