Home / 21,618.90-29,804.43-13,657.14

Finding the Fourth Proportional to 21,618.90, 29,804.43 and 13,657.14

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Solution

The fourth proportional to 21,618.90, 29,804.43 and 13,657.14 is: 18,828.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,618.90 : 29,804.43 = 13,657.14 : x
  2. Step 2: Convert to fraction form
    21,618.90/29,804.43 = 13,657.14/x
  3. Step 3: Cross multiply
    21,618.90x = 29,804.43 × 13,657.14
  4. Step 4: Simplify right side
    21,618.90x = 407,043,273.13
  5. Step 5: Solve for x
    x = 407,043,273.13/21,618.90
  6. Step 6: Final answer
    x = 18,828.12

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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.