Home / 21,129.24-29,158.56-11,698.32

Finding the Fourth Proportional to 21,129.24, 29,158.56 and 11,698.32

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Solution

The fourth proportional to 21,129.24, 29,158.56 and 11,698.32 is: 16,143.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,129.24 : 29,158.56 = 11,698.32 : x
  2. Step 2: Convert to fraction form
    21,129.24/29,158.56 = 11,698.32/x
  3. Step 3: Cross multiply
    21,129.24x = 29,158.56 × 11,698.32
  4. Step 4: Simplify right side
    21,129.24x = 341,106,165.62
  5. Step 5: Solve for x
    x = 341,106,165.62/21,129.24
  6. Step 6: Final answer
    x = 16,143.80

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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.