Home / 21,039.12-31,550.45-7,884.32

Finding the Fourth Proportional to 21,039.12, 31,550.45 and 7,884.32

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Solution

The fourth proportional to 21,039.12, 31,550.45 and 7,884.32 is: 11,823.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,039.12 : 31,550.45 = 7,884.32 : x
  2. Step 2: Convert to fraction form
    21,039.12/31,550.45 = 7,884.32/x
  3. Step 3: Cross multiply
    21,039.12x = 31,550.45 × 7,884.32
  4. Step 4: Simplify right side
    21,039.12x = 248,753,646.77
  5. Step 5: Solve for x
    x = 248,753,646.77/21,039.12
  6. Step 6: Final answer
    x = 11,823.39

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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.