Home / 19,985.21-27,578.17-11,030.80

Finding the Fourth Proportional to 19,985.21, 27,578.17 and 11,030.80

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Solution

The fourth proportional to 19,985.21, 27,578.17 and 11,030.80 is: 15,221.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,985.21 : 27,578.17 = 11,030.80 : x
  2. Step 2: Convert to fraction form
    19,985.21/27,578.17 = 11,030.80/x
  3. Step 3: Cross multiply
    19,985.21x = 27,578.17 × 11,030.80
  4. Step 4: Simplify right side
    19,985.21x = 304,209,277.64
  5. Step 5: Solve for x
    x = 304,209,277.64/19,985.21
  6. Step 6: Final answer
    x = 15,221.72

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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.