Home / 14,678.06-20,255.73-8,390.57

Finding the Fourth Proportional to 14,678.06, 20,255.73 and 8,390.57

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Solution

The fourth proportional to 14,678.06, 20,255.73 and 8,390.57 is: 11,578.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,678.06 : 20,255.73 = 8,390.57 : x
  2. Step 2: Convert to fraction form
    14,678.06/20,255.73 = 8,390.57/x
  3. Step 3: Cross multiply
    14,678.06x = 20,255.73 × 8,390.57
  4. Step 4: Simplify right side
    14,678.06x = 169,957,171.11
  5. Step 5: Solve for x
    x = 169,957,171.11/14,678.06
  6. Step 6: Final answer
    x = 11,578.99

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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.