Home / 28,534.72-39,379.07-15,787.68

Finding the Fourth Proportional to 28,534.72, 39,379.07 and 15,787.68

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Solution

The fourth proportional to 28,534.72, 39,379.07 and 15,787.68 is: 21,787.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,534.72 : 39,379.07 = 15,787.68 : x
  2. Step 2: Convert to fraction form
    28,534.72/39,379.07 = 15,787.68/x
  3. Step 3: Cross multiply
    28,534.72x = 39,379.07 × 15,787.68
  4. Step 4: Simplify right side
    28,534.72x = 621,704,155.86
  5. Step 5: Solve for x
    x = 621,704,155.86/28,534.72
  6. Step 6: Final answer
    x = 21,787.64

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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.