Home / 20,814.08-31,159.60-13,396.64

Finding the Fourth Proportional to 20,814.08, 31,159.60 and 13,396.64

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Solution

The fourth proportional to 20,814.08, 31,159.60 and 13,396.64 is: 20,055.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,814.08 : 31,159.60 = 13,396.64 : x
  2. Step 2: Convert to fraction form
    20,814.08/31,159.60 = 13,396.64/x
  3. Step 3: Cross multiply
    20,814.08x = 31,159.60 × 13,396.64
  4. Step 4: Simplify right side
    20,814.08x = 417,433,943.74
  5. Step 5: Solve for x
    x = 417,433,943.74/20,814.08
  6. Step 6: Final answer
    x = 20,055.36

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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.