Home / 28,725.72-39,640.77-15,978.93

Finding the Fourth Proportional to 28,725.72, 39,640.77 and 15,978.93

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Solution

The fourth proportional to 28,725.72, 39,640.77 and 15,978.93 is: 22,050.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,725.72 : 39,640.77 = 15,978.93 : x
  2. Step 2: Convert to fraction form
    28,725.72/39,640.77 = 15,978.93/x
  3. Step 3: Cross multiply
    28,725.72x = 39,640.77 × 15,978.93
  4. Step 4: Simplify right side
    28,725.72x = 633,417,088.98
  5. Step 5: Solve for x
    x = 633,417,088.98/28,725.72
  6. Step 6: Final answer
    x = 22,050.52

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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.