Home / 12,905.80-19,358.70-8,528.20

Finding the Fourth Proportional to 12,905.80, 19,358.70 and 8,528.20

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Solution

The fourth proportional to 12,905.80, 19,358.70 and 8,528.20 is: 12,792.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,905.80 : 19,358.70 = 8,528.20 : x
  2. Step 2: Convert to fraction form
    12,905.80/19,358.70 = 8,528.20/x
  3. Step 3: Cross multiply
    12,905.80x = 19,358.70 × 8,528.20
  4. Step 4: Simplify right side
    12,905.80x = 165,094,865.34
  5. Step 5: Solve for x
    x = 165,094,865.34/12,905.80
  6. Step 6: Final answer
    x = 12,792.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.