Home / 19,805.28-29,675.52-11,990.40

Finding the Fourth Proportional to 19,805.28, 29,675.52 and 11,990.40

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Solution

The fourth proportional to 19,805.28, 29,675.52 and 11,990.40 is: 17,965.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,805.28 : 29,675.52 = 11,990.40 : x
  2. Step 2: Convert to fraction form
    19,805.28/29,675.52 = 11,990.40/x
  3. Step 3: Cross multiply
    19,805.28x = 29,675.52 × 11,990.40
  4. Step 4: Simplify right side
    19,805.28x = 355,821,355.01
  5. Step 5: Solve for x
    x = 355,821,355.01/19,805.28
  6. Step 6: Final answer
    x = 17,965.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.