Home / 21,316.12-29,429.94-13,765.84

Finding the Fourth Proportional to 21,316.12, 29,429.94 and 13,765.84

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Solution

The fourth proportional to 21,316.12, 29,429.94 and 13,765.84 is: 19,005.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,316.12 : 29,429.94 = 13,765.84 : x
  2. Step 2: Convert to fraction form
    21,316.12/29,429.94 = 13,765.84/x
  3. Step 3: Cross multiply
    21,316.12x = 29,429.94 × 13,765.84
  4. Step 4: Simplify right side
    21,316.12x = 405,127,845.25
  5. Step 5: Solve for x
    x = 405,127,845.25/21,316.12
  6. Step 6: Final answer
    x = 19,005.70

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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.