Home / 28,278.56-39,024.43-15,703.31

Finding the Fourth Proportional to 28,278.56, 39,024.43 and 15,703.31

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Solution

The fourth proportional to 28,278.56, 39,024.43 and 15,703.31 is: 21,670.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,278.56 : 39,024.43 = 15,703.31 : x
  2. Step 2: Convert to fraction form
    28,278.56/39,024.43 = 15,703.31/x
  3. Step 3: Cross multiply
    28,278.56x = 39,024.43 × 15,703.31
  4. Step 4: Simplify right side
    28,278.56x = 612,812,780.17
  5. Step 5: Solve for x
    x = 612,812,780.17/28,278.56
  6. Step 6: Final answer
    x = 21,670.58

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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.