Home / 15,745.32-21,712.15-12,160.87

Finding the Fourth Proportional to 15,745.32, 21,712.15 and 12,160.87

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Solution

The fourth proportional to 15,745.32, 21,712.15 and 12,160.87 is: 16,769.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,745.32 : 21,712.15 = 12,160.87 : x
  2. Step 2: Convert to fraction form
    15,745.32/21,712.15 = 12,160.87/x
  3. Step 3: Cross multiply
    15,745.32x = 21,712.15 × 12,160.87
  4. Step 4: Simplify right side
    15,745.32x = 264,038,594.49
  5. Step 5: Solve for x
    x = 264,038,594.49/15,745.32
  6. Step 6: Final answer
    x = 16,769.34

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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.