Home / 21,109.05-29,126.93-13,153.77

Finding the Fourth Proportional to 21,109.05, 29,126.93 and 13,153.77

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Solution

The fourth proportional to 21,109.05, 29,126.93 and 13,153.77 is: 18,149.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,109.05 : 29,126.93 = 13,153.77 : x
  2. Step 2: Convert to fraction form
    21,109.05/29,126.93 = 13,153.77/x
  3. Step 3: Cross multiply
    21,109.05x = 29,126.93 × 13,153.77
  4. Step 4: Simplify right side
    21,109.05x = 383,128,872.26
  5. Step 5: Solve for x
    x = 383,128,872.26/21,109.05
  6. Step 6: Final answer
    x = 18,149.98

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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.