Home / 21,035.25-29,026.54-12,420.09

Finding the Fourth Proportional to 21,035.25, 29,026.54 and 12,420.09

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Solution

The fourth proportional to 21,035.25, 29,026.54 and 12,420.09 is: 17,138.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,035.25 : 29,026.54 = 12,420.09 : x
  2. Step 2: Convert to fraction form
    21,035.25/29,026.54 = 12,420.09/x
  3. Step 3: Cross multiply
    21,035.25x = 29,026.54 × 12,420.09
  4. Step 4: Simplify right side
    21,035.25x = 360,512,239.19
  5. Step 5: Solve for x
    x = 360,512,239.19/21,035.25
  6. Step 6: Final answer
    x = 17,138.48

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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.