Home / 21,383.56-31,862.21-19,055.80

Finding the Fourth Proportional to 21,383.56, 31,862.21 and 19,055.80

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Solution

The fourth proportional to 21,383.56, 31,862.21 and 19,055.80 is: 28,393.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,383.56 : 31,862.21 = 19,055.80 : x
  2. Step 2: Convert to fraction form
    21,383.56/31,862.21 = 19,055.80/x
  3. Step 3: Cross multiply
    21,383.56x = 31,862.21 × 19,055.80
  4. Step 4: Simplify right side
    21,383.56x = 607,159,901.32
  5. Step 5: Solve for x
    x = 607,159,901.32/21,383.56
  6. Step 6: Final answer
    x = 28,393.77

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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.