Home / 21,427.20-29,573.04-12,812.82

Finding the Fourth Proportional to 21,427.20, 29,573.04 and 12,812.82

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Solution

The fourth proportional to 21,427.20, 29,573.04 and 12,812.82 is: 17,683.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,427.20 : 29,573.04 = 12,812.82 : x
  2. Step 2: Convert to fraction form
    21,427.20/29,573.04 = 12,812.82/x
  3. Step 3: Cross multiply
    21,427.20x = 29,573.04 × 12,812.82
  4. Step 4: Simplify right side
    21,427.20x = 378,914,038.37
  5. Step 5: Solve for x
    x = 378,914,038.37/21,427.20
  6. Step 6: Final answer
    x = 17,683.79

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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.