Home / 21,128.81-29,126.70-16,084.26

Finding the Fourth Proportional to 21,128.81, 29,126.70 and 16,084.26

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Solution

The fourth proportional to 21,128.81, 29,126.70 and 16,084.26 is: 22,172.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,128.81 : 29,126.70 = 16,084.26 : x
  2. Step 2: Convert to fraction form
    21,128.81/29,126.70 = 16,084.26/x
  3. Step 3: Cross multiply
    21,128.81x = 29,126.70 × 16,084.26
  4. Step 4: Simplify right side
    21,128.81x = 468,481,415.74
  5. Step 5: Solve for x
    x = 468,481,415.74/21,128.81
  6. Step 6: Final answer
    x = 22,172.64

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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.