Home / 21,114.66-29,138.59-11,555.39

Finding the Fourth Proportional to 21,114.66, 29,138.59 and 11,555.39

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Solution

The fourth proportional to 21,114.66, 29,138.59 and 11,555.39 is: 15,946.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,114.66 : 29,138.59 = 11,555.39 : x
  2. Step 2: Convert to fraction form
    21,114.66/29,138.59 = 11,555.39/x
  3. Step 3: Cross multiply
    21,114.66x = 29,138.59 × 11,555.39
  4. Step 4: Simplify right side
    21,114.66x = 336,707,858.79
  5. Step 5: Solve for x
    x = 336,707,858.79/21,114.66
  6. Step 6: Final answer
    x = 15,946.64

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Half scale
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Double scale
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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.