Home / 20,967.12-28,903.32-13,881.24

Finding the Fourth Proportional to 20,967.12, 28,903.32 and 13,881.24

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Solution

The fourth proportional to 20,967.12, 28,903.32 and 13,881.24 is: 19,135.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,967.12 : 28,903.32 = 13,881.24 : x
  2. Step 2: Convert to fraction form
    20,967.12/28,903.32 = 13,881.24/x
  3. Step 3: Cross multiply
    20,967.12x = 28,903.32 × 13,881.24
  4. Step 4: Simplify right side
    20,967.12x = 401,213,921.72
  5. Step 5: Solve for x
    x = 401,213,921.72/20,967.12
  6. Step 6: Final answer
    x = 19,135.39

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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.