Home / 20,516.27-28,314.59-12,563.78

Finding the Fourth Proportional to 20,516.27, 28,314.59 and 12,563.78

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Solution

The fourth proportional to 20,516.27, 28,314.59 and 12,563.78 is: 17,339.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516.27 : 28,314.59 = 12,563.78 : x
  2. Step 2: Convert to fraction form
    20,516.27/28,314.59 = 12,563.78/x
  3. Step 3: Cross multiply
    20,516.27x = 28,314.59 × 12,563.78
  4. Step 4: Simplify right side
    20,516.27x = 355,738,075.16
  5. Step 5: Solve for x
    x = 355,738,075.16/20,516.27
  6. Step 6: Final answer
    x = 17,339.32

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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.