Home / 21,285.38-29,357.07-13,214.48

Finding the Fourth Proportional to 21,285.38, 29,357.07 and 13,214.48

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Solution

The fourth proportional to 21,285.38, 29,357.07 and 13,214.48 is: 18,225.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,285.38 : 29,357.07 = 13,214.48 : x
  2. Step 2: Convert to fraction form
    21,285.38/29,357.07 = 13,214.48/x
  3. Step 3: Cross multiply
    21,285.38x = 29,357.07 × 13,214.48
  4. Step 4: Simplify right side
    21,285.38x = 387,938,218.03
  5. Step 5: Solve for x
    x = 387,938,218.03/21,285.38
  6. Step 6: Final answer
    x = 18,225.57

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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.