Home / 21,223.64-29,288.79-13,270.47

Finding the Fourth Proportional to 21,223.64, 29,288.79 and 13,270.47

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Solution

The fourth proportional to 21,223.64, 29,288.79 and 13,270.47 is: 18,313.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,223.64 : 29,288.79 = 13,270.47 : x
  2. Step 2: Convert to fraction form
    21,223.64/29,288.79 = 13,270.47/x
  3. Step 3: Cross multiply
    21,223.64x = 29,288.79 × 13,270.47
  4. Step 4: Simplify right side
    21,223.64x = 388,676,009.03
  5. Step 5: Solve for x
    x = 388,676,009.03/21,223.64
  6. Step 6: Final answer
    x = 18,313.36

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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.