Home / 28,928.16-39,907.62-16,991.28

Finding the Fourth Proportional to 28,928.16, 39,907.62 and 16,991.28

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Solution

The fourth proportional to 28,928.16, 39,907.62 and 16,991.28 is: 23,440.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,928.16 : 39,907.62 = 16,991.28 : x
  2. Step 2: Convert to fraction form
    28,928.16/39,907.62 = 16,991.28/x
  3. Step 3: Cross multiply
    28,928.16x = 39,907.62 × 16,991.28
  4. Step 4: Simplify right side
    28,928.16x = 678,081,545.55
  5. Step 5: Solve for x
    x = 678,081,545.55/28,928.16
  6. Step 6: Final answer
    x = 23,440.19

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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.