Home / 21,345.36-29,456.72-11,785.08

Finding the Fourth Proportional to 21,345.36, 29,456.72 and 11,785.08

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Solution

The fourth proportional to 21,345.36, 29,456.72 and 11,785.08 is: 16,263.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,345.36 : 29,456.72 = 11,785.08 : x
  2. Step 2: Convert to fraction form
    21,345.36/29,456.72 = 11,785.08/x
  3. Step 3: Cross multiply
    21,345.36x = 29,456.72 × 11,785.08
  4. Step 4: Simplify right side
    21,345.36x = 347,149,742.81
  5. Step 5: Solve for x
    x = 347,149,742.81/21,345.36
  6. Step 6: Final answer
    x = 16,263.48

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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.