Home / 20,583.77-28,406.40-12,515.11

Finding the Fourth Proportional to 20,583.77, 28,406.40 and 12,515.11

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Solution

The fourth proportional to 20,583.77, 28,406.40 and 12,515.11 is: 17,271.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,583.77 : 28,406.40 = 12,515.11 : x
  2. Step 2: Convert to fraction form
    20,583.77/28,406.40 = 12,515.11/x
  3. Step 3: Cross multiply
    20,583.77x = 28,406.40 × 12,515.11
  4. Step 4: Simplify right side
    20,583.77x = 355,509,102.76
  5. Step 5: Solve for x
    x = 355,509,102.76/20,583.77
  6. Step 6: Final answer
    x = 17,271.33

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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.