Home / 20,440.49-28,172.00-19,871.87

Finding the Fourth Proportional to 20,440.49, 28,172.00 and 19,871.87

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Solution

The fourth proportional to 20,440.49, 28,172.00 and 19,871.87 is: 27,388.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.49 : 28,172.00 = 19,871.87 : x
  2. Step 2: Convert to fraction form
    20,440.49/28,172.00 = 19,871.87/x
  3. Step 3: Cross multiply
    20,440.49x = 28,172.00 × 19,871.87
  4. Step 4: Simplify right side
    20,440.49x = 559,830,230.46
  5. Step 5: Solve for x
    x = 559,830,230.46/20,440.49
  6. Step 6: Final answer
    x = 27,388.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.