Home / 28,531.17-39,374.37-15,784.29

Finding the Fourth Proportional to 28,531.17, 39,374.37 and 15,784.29

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Solution

The fourth proportional to 28,531.17, 39,374.37 and 15,784.29 is: 21,783.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,531.17 : 39,374.37 = 15,784.29 : x
  2. Step 2: Convert to fraction form
    28,531.17/39,374.37 = 15,784.29/x
  3. Step 3: Cross multiply
    28,531.17x = 39,374.37 × 15,784.29
  4. Step 4: Simplify right side
    28,531.17x = 621,496,474.65
  5. Step 5: Solve for x
    x = 621,496,474.65/28,531.17
  6. Step 6: Final answer
    x = 21,783.07

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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.