Home / 21,055.56-29,057.21-11,980.42

Finding the Fourth Proportional to 21,055.56, 29,057.21 and 11,980.42

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Solution

The fourth proportional to 21,055.56, 29,057.21 and 11,980.42 is: 16,533.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,055.56 : 29,057.21 = 11,980.42 : x
  2. Step 2: Convert to fraction form
    21,055.56/29,057.21 = 11,980.42/x
  3. Step 3: Cross multiply
    21,055.56x = 29,057.21 × 11,980.42
  4. Step 4: Simplify right side
    21,055.56x = 348,117,579.83
  5. Step 5: Solve for x
    x = 348,117,579.83/21,055.56
  6. Step 6: Final answer
    x = 16,533.29

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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.