Home / 28,121.28-38,807.40-15,546

Finding the Fourth Proportional to 28,121.28, 38,807.40 and 15,546

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Solution

The fourth proportional to 28,121.28, 38,807.40 and 15,546 is: 21,453.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,121.28 : 38,807.40 = 15,546 : x
  2. Step 2: Convert to fraction form
    28,121.28/38,807.40 = 15,546/x
  3. Step 3: Cross multiply
    28,121.28x = 38,807.40 × 15,546
  4. Step 4: Simplify right side
    28,121.28x = 603,299,840.40
  5. Step 5: Solve for x
    x = 603,299,840.40/28,121.28
  6. Step 6: Final answer
    x = 21,453.50

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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.