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Finding the Fourth Proportional to 18,762.50, 25,890 and 10,807.32

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Solution

The fourth proportional to 18,762.50, 25,890 and 10,807.32 is: 14,912.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,762.50 : 25,890 = 10,807.32 : x
  2. Step 2: Convert to fraction form
    18,762.50/25,890 = 10,807.32/x
  3. Step 3: Cross multiply
    18,762.50x = 25,890 × 10,807.32
  4. Step 4: Simplify right side
    18,762.50x = 279,801,514.80
  5. Step 5: Solve for x
    x = 279,801,514.80/18,762.50
  6. Step 6: Final answer
    x = 14,912.81

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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.