Home / 21,022.11-31,455.41-17,289.63

Finding the Fourth Proportional to 21,022.11, 31,455.41 and 17,289.63

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Solution

The fourth proportional to 21,022.11, 31,455.41 and 17,289.63 is: 25,870.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,022.11 : 31,455.41 = 17,289.63 : x
  2. Step 2: Convert to fraction form
    21,022.11/31,455.41 = 17,289.63/x
  3. Step 3: Cross multiply
    21,022.11x = 31,455.41 × 17,289.63
  4. Step 4: Simplify right side
    21,022.11x = 543,852,313.95
  5. Step 5: Solve for x
    x = 543,852,313.95/21,022.11
  6. Step 6: Final answer
    x = 25,870.49

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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.