Home / 21,871.80-30,171.60-16,557.39

Finding the Fourth Proportional to 21,871.80, 30,171.60 and 16,557.39

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Solution

The fourth proportional to 21,871.80, 30,171.60 and 16,557.39 is: 22,840.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,871.80 : 30,171.60 = 16,557.39 : x
  2. Step 2: Convert to fraction form
    21,871.80/30,171.60 = 16,557.39/x
  3. Step 3: Cross multiply
    21,871.80x = 30,171.60 × 16,557.39
  4. Step 4: Simplify right side
    21,871.80x = 499,562,948.12
  5. Step 5: Solve for x
    x = 499,562,948.12/21,871.80
  6. Step 6: Final answer
    x = 22,840.50

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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.