Home / 21,127.40-31,652.10-18,322.57

Finding the Fourth Proportional to 21,127.40, 31,652.10 and 18,322.57

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Solution

The fourth proportional to 21,127.40, 31,652.10 and 18,322.57 is: 27,450.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.40 : 31,652.10 = 18,322.57 : x
  2. Step 2: Convert to fraction form
    21,127.40/31,652.10 = 18,322.57/x
  3. Step 3: Cross multiply
    21,127.40x = 31,652.10 × 18,322.57
  4. Step 4: Simplify right side
    21,127.40x = 579,947,857.46
  5. Step 5: Solve for x
    x = 579,947,857.46/21,127.40
  6. Step 6: Final answer
    x = 27,450.04

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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.