Home / 31,137.45-42,969.47-16,989.99

Finding the Fourth Proportional to 31,137.45, 42,969.47 and 16,989.99

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Solution

The fourth proportional to 31,137.45, 42,969.47 and 16,989.99 is: 23,446.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,137.45 : 42,969.47 = 16,989.99 : x
  2. Step 2: Convert to fraction form
    31,137.45/42,969.47 = 16,989.99/x
  3. Step 3: Cross multiply
    31,137.45x = 42,969.47 × 16,989.99
  4. Step 4: Simplify right side
    31,137.45x = 730,050,780.66
  5. Step 5: Solve for x
    x = 730,050,780.66/31,137.45
  6. Step 6: Final answer
    x = 23,446.07

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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.