Home / 21,115.16-31,537.87-19,110.80

Finding the Fourth Proportional to 21,115.16, 31,537.87 and 19,110.80

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Solution

The fourth proportional to 21,115.16, 31,537.87 and 19,110.80 is: 28,544.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.16 : 31,537.87 = 19,110.80 : x
  2. Step 2: Convert to fraction form
    21,115.16/31,537.87 = 19,110.80/x
  3. Step 3: Cross multiply
    21,115.16x = 31,537.87 × 19,110.80
  4. Step 4: Simplify right side
    21,115.16x = 602,713,926.00
  5. Step 5: Solve for x
    x = 602,713,926.00/21,115.16
  6. Step 6: Final answer
    x = 28,544.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.