Home / 21,986.10-30,349.89-15,706.98

Finding the Fourth Proportional to 21,986.10, 30,349.89 and 15,706.98

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Solution

The fourth proportional to 21,986.10, 30,349.89 and 15,706.98 is: 21,682.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,986.10 : 30,349.89 = 15,706.98 : x
  2. Step 2: Convert to fraction form
    21,986.10/30,349.89 = 15,706.98/x
  3. Step 3: Cross multiply
    21,986.10x = 30,349.89 × 15,706.98
  4. Step 4: Simplify right side
    21,986.10x = 476,705,115.23
  5. Step 5: Solve for x
    x = 476,705,115.23/21,986.10
  6. Step 6: Final answer
    x = 21,682.11

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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.