Home / 21,323.79-29,411.60-18,486.09

Finding the Fourth Proportional to 21,323.79, 29,411.60 and 18,486.09

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Solution

The fourth proportional to 21,323.79, 29,411.60 and 18,486.09 is: 25,497.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,323.79 : 29,411.60 = 18,486.09 : x
  2. Step 2: Convert to fraction form
    21,323.79/29,411.60 = 18,486.09/x
  3. Step 3: Cross multiply
    21,323.79x = 29,411.60 × 18,486.09
  4. Step 4: Simplify right side
    21,323.79x = 543,705,392.21
  5. Step 5: Solve for x
    x = 543,705,392.21/21,323.79
  6. Step 6: Final answer
    x = 25,497.60

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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.