Home / 20,838.15-31,255.49-8,188.17

Finding the Fourth Proportional to 20,838.15, 31,255.49 and 8,188.17

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Solution

The fourth proportional to 20,838.15, 31,255.49 and 8,188.17 is: 12,281.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.15 : 31,255.49 = 8,188.17 : x
  2. Step 2: Convert to fraction form
    20,838.15/31,255.49 = 8,188.17/x
  3. Step 3: Cross multiply
    20,838.15x = 31,255.49 × 8,188.17
  4. Step 4: Simplify right side
    20,838.15x = 255,925,224.61
  5. Step 5: Solve for x
    x = 255,925,224.61/20,838.15
  6. Step 6: Final answer
    x = 12,281.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.