Home / 28,531.67-39,374.88-15,784.65

Finding the Fourth Proportional to 28,531.67, 39,374.88 and 15,784.65

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Solution

The fourth proportional to 28,531.67, 39,374.88 and 15,784.65 is: 21,783.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,531.67 : 39,374.88 = 15,784.65 : x
  2. Step 2: Convert to fraction form
    28,531.67/39,374.88 = 15,784.65/x
  3. Step 3: Cross multiply
    28,531.67x = 39,374.88 × 15,784.65
  4. Step 4: Simplify right side
    28,531.67x = 621,518,502.72
  5. Step 5: Solve for x
    x = 621,518,502.72/28,531.67
  6. Step 6: Final answer
    x = 21,783.46

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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.