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Finding the Fourth Proportional to 27,807.89, 38,375.50 and 15,870.98

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Solution

The fourth proportional to 27,807.89, 38,375.50 and 15,870.98 is: 21,902.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,807.89 : 38,375.50 = 15,870.98 : x
  2. Step 2: Convert to fraction form
    27,807.89/38,375.50 = 15,870.98/x
  3. Step 3: Cross multiply
    27,807.89x = 38,375.50 × 15,870.98
  4. Step 4: Simplify right side
    27,807.89x = 609,056,792.99
  5. Step 5: Solve for x
    x = 609,056,792.99/27,807.89
  6. Step 6: Final answer
    x = 21,902.31

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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.