Home / 15,501.31-21,391.36-8,787.56

Finding the Fourth Proportional to 15,501.31, 21,391.36 and 8,787.56

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Solution

The fourth proportional to 15,501.31, 21,391.36 and 8,787.56 is: 12,126.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,501.31 : 21,391.36 = 8,787.56 : x
  2. Step 2: Convert to fraction form
    15,501.31/21,391.36 = 8,787.56/x
  3. Step 3: Cross multiply
    15,501.31x = 21,391.36 × 8,787.56
  4. Step 4: Simplify right side
    15,501.31x = 187,977,730.56
  5. Step 5: Solve for x
    x = 187,977,730.56/15,501.31
  6. Step 6: Final answer
    x = 12,126.57

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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.