Home / 21,353.47-29,465.56-12,399.23

Finding the Fourth Proportional to 21,353.47, 29,465.56 and 12,399.23

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Solution

The fourth proportional to 21,353.47, 29,465.56 and 12,399.23 is: 17,109.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,353.47 : 29,465.56 = 12,399.23 : x
  2. Step 2: Convert to fraction form
    21,353.47/29,465.56 = 12,399.23/x
  3. Step 3: Cross multiply
    21,353.47x = 29,465.56 × 12,399.23
  4. Step 4: Simplify right side
    21,353.47x = 365,350,046.19
  5. Step 5: Solve for x
    x = 365,350,046.19/21,353.47
  6. Step 6: Final answer
    x = 17,109.63

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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.