Home / 21,436.12-31,997.93-19,681.08

Finding the Fourth Proportional to 21,436.12, 31,997.93 and 19,681.08

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Solution

The fourth proportional to 21,436.12, 31,997.93 and 19,681.08 is: 29,378.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,436.12 : 31,997.93 = 19,681.08 : x
  2. Step 2: Convert to fraction form
    21,436.12/31,997.93 = 19,681.08/x
  3. Step 3: Cross multiply
    21,436.12x = 31,997.93 × 19,681.08
  4. Step 4: Simplify right side
    21,436.12x = 629,753,820.16
  5. Step 5: Solve for x
    x = 629,753,820.16/21,436.12
  6. Step 6: Final answer
    x = 29,378.16

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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.