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Finding the Fourth Proportional to 28,807.89, 39,762.41 and 18,763.89

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Solution

The fourth proportional to 28,807.89, 39,762.41 and 18,763.89 is: 25,899.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,807.89 : 39,762.41 = 18,763.89 : x
  2. Step 2: Convert to fraction form
    28,807.89/39,762.41 = 18,763.89/x
  3. Step 3: Cross multiply
    28,807.89x = 39,762.41 × 18,763.89
  4. Step 4: Simplify right side
    28,807.89x = 746,097,393.56
  5. Step 5: Solve for x
    x = 746,097,393.56/28,807.89
  6. Step 6: Final answer
    x = 25,899.06

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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.