Home / 21,277.54-31,900.43-19,938.45

Finding the Fourth Proportional to 21,277.54, 31,900.43 and 19,938.45

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Solution

The fourth proportional to 21,277.54, 31,900.43 and 19,938.45 is: 29,892.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,277.54 : 31,900.43 = 19,938.45 : x
  2. Step 2: Convert to fraction form
    21,277.54/31,900.43 = 19,938.45/x
  3. Step 3: Cross multiply
    21,277.54x = 31,900.43 × 19,938.45
  4. Step 4: Simplify right side
    21,277.54x = 636,045,298.01
  5. Step 5: Solve for x
    x = 636,045,298.01/21,277.54
  6. Step 6: Final answer
    x = 29,892.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.