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Finding the Fourth Proportional to 20,210.70, 30,283.65 and 12,801.90

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Solution

The fourth proportional to 20,210.70, 30,283.65 and 12,801.90 is: 19,182.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,210.70 : 30,283.65 = 12,801.90 : x
  2. Step 2: Convert to fraction form
    20,210.70/30,283.65 = 12,801.90/x
  3. Step 3: Cross multiply
    20,210.70x = 30,283.65 × 12,801.90
  4. Step 4: Simplify right side
    20,210.70x = 387,688,258.94
  5. Step 5: Solve for x
    x = 387,688,258.94/20,210.70
  6. Step 6: Final answer
    x = 19,182.33

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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.