Home / 31,137.36-42,969.80-16,990.32

Finding the Fourth Proportional to 31,137.36, 42,969.80 and 16,990.32

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Solution

The fourth proportional to 31,137.36, 42,969.80 and 16,990.32 is: 23,446.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,137.36 : 42,969.80 = 16,990.32 : x
  2. Step 2: Convert to fraction form
    31,137.36/42,969.80 = 16,990.32/x
  3. Step 3: Cross multiply
    31,137.36x = 42,969.80 × 16,990.32
  4. Step 4: Simplify right side
    31,137.36x = 730,070,652.34
  5. Step 5: Solve for x
    x = 730,070,652.34/31,137.36
  6. Step 6: Final answer
    x = 23,446.77

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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.