Home / 28,392.11-39,181.89-15,816.86

Finding the Fourth Proportional to 28,392.11, 39,181.89 and 15,816.86

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Solution

The fourth proportional to 28,392.11, 39,181.89 and 15,816.86 is: 21,827.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,392.11 : 39,181.89 = 15,816.86 : x
  2. Step 2: Convert to fraction form
    28,392.11/39,181.89 = 15,816.86/x
  3. Step 3: Cross multiply
    28,392.11x = 39,181.89 × 15,816.86
  4. Step 4: Simplify right side
    28,392.11x = 619,734,468.67
  5. Step 5: Solve for x
    x = 619,734,468.67/28,392.11
  6. Step 6: Final answer
    x = 21,827.70

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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.