Home / 31,137.60-42,969.81-16,990.44

Finding the Fourth Proportional to 31,137.60, 42,969.81 and 16,990.44

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Solution

The fourth proportional to 31,137.60, 42,969.81 and 16,990.44 is: 23,446.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,137.60 : 42,969.81 = 16,990.44 : x
  2. Step 2: Convert to fraction form
    31,137.60/42,969.81 = 16,990.44/x
  3. Step 3: Cross multiply
    31,137.60x = 42,969.81 × 16,990.44
  4. Step 4: Simplify right side
    31,137.60x = 730,075,978.62
  5. Step 5: Solve for x
    x = 730,075,978.62/31,137.60
  6. Step 6: Final answer
    x = 23,446.76

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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.