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Finding the Fourth Proportional to 20,902.74, 28,802.43 and 19,457.70

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Solution

The fourth proportional to 20,902.74, 28,802.43 and 19,457.70 is: 26,811.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,902.74 : 28,802.43 = 19,457.70 : x
  2. Step 2: Convert to fraction form
    20,902.74/28,802.43 = 19,457.70/x
  3. Step 3: Cross multiply
    20,902.74x = 28,802.43 × 19,457.70
  4. Step 4: Simplify right side
    20,902.74x = 560,429,042.21
  5. Step 5: Solve for x
    x = 560,429,042.21/20,902.74
  6. Step 6: Final answer
    x = 26,811.27

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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.