Home / 15,721.80-23,640.30-13,187.40

Finding the Fourth Proportional to 15,721.80, 23,640.30 and 13,187.40

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Solution

The fourth proportional to 15,721.80, 23,640.30 and 13,187.40 is: 19,829.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,721.80 : 23,640.30 = 13,187.40 : x
  2. Step 2: Convert to fraction form
    15,721.80/23,640.30 = 13,187.40/x
  3. Step 3: Cross multiply
    15,721.80x = 23,640.30 × 13,187.40
  4. Step 4: Simplify right side
    15,721.80x = 311,754,092.22
  5. Step 5: Solve for x
    x = 311,754,092.22/15,721.80
  6. Step 6: Final answer
    x = 19,829.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.