Home / 19,920.30-27,491.25-10,969.80

Finding the Fourth Proportional to 19,920.30, 27,491.25 and 10,969.80

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Solution

The fourth proportional to 19,920.30, 27,491.25 and 10,969.80 is: 15,139.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,920.30 : 27,491.25 = 10,969.80 : x
  2. Step 2: Convert to fraction form
    19,920.30/27,491.25 = 10,969.80/x
  3. Step 3: Cross multiply
    19,920.30x = 27,491.25 × 10,969.80
  4. Step 4: Simplify right side
    19,920.30x = 301,573,514.25
  5. Step 5: Solve for x
    x = 301,573,514.25/19,920.30
  6. Step 6: Final answer
    x = 15,139.00

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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.