Home / 31,116.81-42,941.30-16,969.71

Finding the Fourth Proportional to 31,116.81, 42,941.30 and 16,969.71

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Solution

The fourth proportional to 31,116.81, 42,941.30 and 16,969.71 is: 23,418.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,116.81 : 42,941.30 = 16,969.71 : x
  2. Step 2: Convert to fraction form
    31,116.81/42,941.30 = 16,969.71/x
  3. Step 3: Cross multiply
    31,116.81x = 42,941.30 × 16,969.71
  4. Step 4: Simplify right side
    31,116.81x = 728,701,323.17
  5. Step 5: Solve for x
    x = 728,701,323.17/31,116.81
  6. Step 6: Final answer
    x = 23,418.25

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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.