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Finding the Fourth Proportional to 28,865.81, 43,312.48 and 19,994.81

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Solution

The fourth proportional to 28,865.81, 43,312.48 and 19,994.81 is: 30,001.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,865.81 : 43,312.48 = 19,994.81 : x
  2. Step 2: Convert to fraction form
    28,865.81/43,312.48 = 19,994.81/x
  3. Step 3: Cross multiply
    28,865.81x = 43,312.48 × 19,994.81
  4. Step 4: Simplify right side
    28,865.81x = 866,024,808.23
  5. Step 5: Solve for x
    x = 866,024,808.23/28,865.81
  6. Step 6: Final answer
    x = 30,001.75

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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.