Home / 21,003.84-31,320-19,573.92

Finding the Fourth Proportional to 21,003.84, 31,320 and 19,573.92

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Solution

The fourth proportional to 21,003.84, 31,320 and 19,573.92 is: 29,187.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,003.84 : 31,320 = 19,573.92 : x
  2. Step 2: Convert to fraction form
    21,003.84/31,320 = 19,573.92/x
  3. Step 3: Cross multiply
    21,003.84x = 31,320 × 19,573.92
  4. Step 4: Simplify right side
    21,003.84x = 613,055,174.40
  5. Step 5: Solve for x
    x = 613,055,174.40/21,003.84
  6. Step 6: Final answer
    x = 29,187.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.