Home / 28,783.15-39,720.11-16,036.31

Finding the Fourth Proportional to 28,783.15, 39,720.11 and 16,036.31

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Solution

The fourth proportional to 28,783.15, 39,720.11 and 16,036.31 is: 22,129.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,783.15 : 39,720.11 = 16,036.31 : x
  2. Step 2: Convert to fraction form
    28,783.15/39,720.11 = 16,036.31/x
  3. Step 3: Cross multiply
    28,783.15x = 39,720.11 × 16,036.31
  4. Step 4: Simplify right side
    28,783.15x = 636,964,016.31
  5. Step 5: Solve for x
    x = 636,964,016.31/28,783.15
  6. Step 6: Final answer
    x = 22,129.76

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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.