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Finding the Fourth Proportional to 18,739.36, 25,860.36 and 10,356.40

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Solution

The fourth proportional to 18,739.36, 25,860.36 and 10,356.40 is: 14,291.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,739.36 : 25,860.36 = 10,356.40 : x
  2. Step 2: Convert to fraction form
    18,739.36/25,860.36 = 10,356.40/x
  3. Step 3: Cross multiply
    18,739.36x = 25,860.36 × 10,356.40
  4. Step 4: Simplify right side
    18,739.36x = 267,820,232.30
  5. Step 5: Solve for x
    x = 267,820,232.30/18,739.36
  6. Step 6: Final answer
    x = 14,291.86

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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.