Home / 21,112.47-29,122.70-13,153.14

Finding the Fourth Proportional to 21,112.47, 29,122.70 and 13,153.14

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Solution

The fourth proportional to 21,112.47, 29,122.70 and 13,153.14 is: 18,143.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,112.47 : 29,122.70 = 13,153.14 : x
  2. Step 2: Convert to fraction form
    21,112.47/29,122.70 = 13,153.14/x
  3. Step 3: Cross multiply
    21,112.47x = 29,122.70 × 13,153.14
  4. Step 4: Simplify right side
    21,112.47x = 383,054,884.51
  5. Step 5: Solve for x
    x = 383,054,884.51/21,112.47
  6. Step 6: Final answer
    x = 18,143.54

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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.