Home / 19,578.51-29,370.47-7,890.75

Finding the Fourth Proportional to 19,578.51, 29,370.47 and 7,890.75

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Solution

The fourth proportional to 19,578.51, 29,370.47 and 7,890.75 is: 11,837.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,578.51 : 29,370.47 = 7,890.75 : x
  2. Step 2: Convert to fraction form
    19,578.51/29,370.47 = 7,890.75/x
  3. Step 3: Cross multiply
    19,578.51x = 29,370.47 × 7,890.75
  4. Step 4: Simplify right side
    19,578.51x = 231,754,996.70
  5. Step 5: Solve for x
    x = 231,754,996.70/19,578.51
  6. Step 6: Final answer
    x = 11,837.21

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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.