Home / 21,106.20-29,129.72-13,150.99

Finding the Fourth Proportional to 21,106.20, 29,129.72 and 13,150.99

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Solution

The fourth proportional to 21,106.20, 29,129.72 and 13,150.99 is: 18,150.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,106.20 : 29,129.72 = 13,150.99 : x
  2. Step 2: Convert to fraction form
    21,106.20/29,129.72 = 13,150.99/x
  3. Step 3: Cross multiply
    21,106.20x = 29,129.72 × 13,150.99
  4. Step 4: Simplify right side
    21,106.20x = 383,084,656.42
  5. Step 5: Solve for x
    x = 383,084,656.42/21,106.20
  6. Step 6: Final answer
    x = 18,150.34

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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.