Home / 14,708.36-20,297.58-8,420.78

Finding the Fourth Proportional to 14,708.36, 20,297.58 and 8,420.78

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Solution

The fourth proportional to 14,708.36, 20,297.58 and 8,420.78 is: 11,620.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,708.36 : 20,297.58 = 8,420.78 : x
  2. Step 2: Convert to fraction form
    14,708.36/20,297.58 = 8,420.78/x
  3. Step 3: Cross multiply
    14,708.36x = 20,297.58 × 8,420.78
  4. Step 4: Simplify right side
    14,708.36x = 170,921,455.71
  5. Step 5: Solve for x
    x = 170,921,455.71/14,708.36
  6. Step 6: Final answer
    x = 11,620.70

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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.