Home / 21,106.96-29,129.10-11,675.32

Finding the Fourth Proportional to 21,106.96, 29,129.10 and 11,675.32

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Solution

The fourth proportional to 21,106.96, 29,129.10 and 11,675.32 is: 16,112.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,106.96 : 29,129.10 = 11,675.32 : x
  2. Step 2: Convert to fraction form
    21,106.96/29,129.10 = 11,675.32/x
  3. Step 3: Cross multiply
    21,106.96x = 29,129.10 × 11,675.32
  4. Step 4: Simplify right side
    21,106.96x = 340,091,563.81
  5. Step 5: Solve for x
    x = 340,091,563.81/21,106.96
  6. Step 6: Final answer
    x = 16,112.77

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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.