Home / 28,146.88-38,840.34-15,571.36

Finding the Fourth Proportional to 28,146.88, 38,840.34 and 15,571.36

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Solution

The fourth proportional to 28,146.88, 38,840.34 and 15,571.36 is: 21,487.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,146.88 : 38,840.34 = 15,571.36 : x
  2. Step 2: Convert to fraction form
    28,146.88/38,840.34 = 15,571.36/x
  3. Step 3: Cross multiply
    28,146.88x = 38,840.34 × 15,571.36
  4. Step 4: Simplify right side
    28,146.88x = 604,796,916.66
  5. Step 5: Solve for x
    x = 604,796,916.66/28,146.88
  6. Step 6: Final answer
    x = 21,487.17

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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.