Home / 28,777.66-39,723.98-21,284.32

Finding the Fourth Proportional to 28,777.66, 39,723.98 and 21,284.32

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Solution

The fourth proportional to 28,777.66, 39,723.98 and 21,284.32 is: 29,380.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,777.66 : 39,723.98 = 21,284.32 : x
  2. Step 2: Convert to fraction form
    28,777.66/39,723.98 = 21,284.32/x
  3. Step 3: Cross multiply
    28,777.66x = 39,723.98 × 21,284.32
  4. Step 4: Simplify right side
    28,777.66x = 845,497,901.99
  5. Step 5: Solve for x
    x = 845,497,901.99/28,777.66
  6. Step 6: Final answer
    x = 29,380.36

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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.