Home / 28,930.72-39,920.16-16,997.92

Finding the Fourth Proportional to 28,930.72, 39,920.16 and 16,997.92

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Solution

The fourth proportional to 28,930.72, 39,920.16 and 16,997.92 is: 23,454.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,930.72 : 39,920.16 = 16,997.92 : x
  2. Step 2: Convert to fraction form
    28,930.72/39,920.16 = 16,997.92/x
  3. Step 3: Cross multiply
    28,930.72x = 39,920.16 × 16,997.92
  4. Step 4: Simplify right side
    28,930.72x = 678,559,686.07
  5. Step 5: Solve for x
    x = 678,559,686.07/28,930.72
  6. Step 6: Final answer
    x = 23,454.64

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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.