Home / 14,389.86-19,857.94-8,420.37

Finding the Fourth Proportional to 14,389.86, 19,857.94 and 8,420.37

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Solution

The fourth proportional to 14,389.86, 19,857.94 and 8,420.37 is: 11,620.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,389.86 : 19,857.94 = 8,420.37 : x
  2. Step 2: Convert to fraction form
    14,389.86/19,857.94 = 8,420.37/x
  3. Step 3: Cross multiply
    14,389.86x = 19,857.94 × 8,420.37
  4. Step 4: Simplify right side
    14,389.86x = 167,211,202.24
  5. Step 5: Solve for x
    x = 167,211,202.24/14,389.86
  6. Step 6: Final answer
    x = 11,620.07

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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.