Home / 15,931.58-21,983.91-8,856.86

Finding the Fourth Proportional to 15,931.58, 21,983.91 and 8,856.86

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Solution

The fourth proportional to 15,931.58, 21,983.91 and 8,856.86 is: 12,221.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,931.58 : 21,983.91 = 8,856.86 : x
  2. Step 2: Convert to fraction form
    15,931.58/21,983.91 = 8,856.86/x
  3. Step 3: Cross multiply
    15,931.58x = 21,983.91 × 8,856.86
  4. Step 4: Simplify right side
    15,931.58x = 194,708,413.12
  5. Step 5: Solve for x
    x = 194,708,413.12/15,931.58
  6. Step 6: Final answer
    x = 12,221.54

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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.