Home / 15,745.85-21,722.25-10,639.72

Finding the Fourth Proportional to 15,745.85, 21,722.25 and 10,639.72

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Solution

The fourth proportional to 15,745.85, 21,722.25 and 10,639.72 is: 14,678.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,745.85 : 21,722.25 = 10,639.72 : x
  2. Step 2: Convert to fraction form
    15,745.85/21,722.25 = 10,639.72/x
  3. Step 3: Cross multiply
    15,745.85x = 21,722.25 × 10,639.72
  4. Step 4: Simplify right side
    15,745.85x = 231,118,603.46
  5. Step 5: Solve for x
    x = 231,118,603.46/15,745.85
  6. Step 6: Final answer
    x = 14,678.06

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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.