Home / 28,384.25-39,171.48-15,809

Finding the Fourth Proportional to 28,384.25, 39,171.48 and 15,809

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Solution

The fourth proportional to 28,384.25, 39,171.48 and 15,809 is: 21,817.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,384.25 : 39,171.48 = 15,809 : x
  2. Step 2: Convert to fraction form
    28,384.25/39,171.48 = 15,809/x
  3. Step 3: Cross multiply
    28,384.25x = 39,171.48 × 15,809
  4. Step 4: Simplify right side
    28,384.25x = 619,261,927.32
  5. Step 5: Solve for x
    x = 619,261,927.32/28,384.25
  6. Step 6: Final answer
    x = 21,817.10

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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.