Home / 31,085.80-42,898.40-16,938.64

Finding the Fourth Proportional to 31,085.80, 42,898.40 and 16,938.64

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Solution

The fourth proportional to 31,085.80, 42,898.40 and 16,938.64 is: 23,375.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,085.80 : 42,898.40 = 16,938.64 : x
  2. Step 2: Convert to fraction form
    31,085.80/42,898.40 = 16,938.64/x
  3. Step 3: Cross multiply
    31,085.80x = 42,898.40 × 16,938.64
  4. Step 4: Simplify right side
    31,085.80x = 726,640,554.18
  5. Step 5: Solve for x
    x = 726,640,554.18/31,085.80
  6. Step 6: Final answer
    x = 23,375.32

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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.