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Finding the Fourth Proportional to 18,719.51, 25,830.90 and 10,762.88

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Solution

The fourth proportional to 18,719.51, 25,830.90 and 10,762.88 is: 14,851.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.51 : 25,830.90 = 10,762.88 : x
  2. Step 2: Convert to fraction form
    18,719.51/25,830.90 = 10,762.88/x
  3. Step 3: Cross multiply
    18,719.51x = 25,830.90 × 10,762.88
  4. Step 4: Simplify right side
    18,719.51x = 278,014,747.84
  5. Step 5: Solve for x
    x = 278,014,747.84/18,719.51
  6. Step 6: Final answer
    x = 14,851.61

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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.