Home / 20,516.63-28,297.08-12,960.20

Finding the Fourth Proportional to 20,516.63, 28,297.08 and 12,960.20

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Solution

The fourth proportional to 20,516.63, 28,297.08 and 12,960.20 is: 17,875.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516.63 : 28,297.08 = 12,960.20 : x
  2. Step 2: Convert to fraction form
    20,516.63/28,297.08 = 12,960.20/x
  3. Step 3: Cross multiply
    20,516.63x = 28,297.08 × 12,960.20
  4. Step 4: Simplify right side
    20,516.63x = 366,735,886.96
  5. Step 5: Solve for x
    x = 366,735,886.96/20,516.63
  6. Step 6: Final answer
    x = 17,875.06

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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.