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Finding the Fourth Proportional to 18,878.37, 28,339.47 and 10,130.37

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Solution

The fourth proportional to 18,878.37, 28,339.47 and 10,130.37 is: 15,207.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,878.37 : 28,339.47 = 10,130.37 : x
  2. Step 2: Convert to fraction form
    18,878.37/28,339.47 = 10,130.37/x
  3. Step 3: Cross multiply
    18,878.37x = 28,339.47 × 10,130.37
  4. Step 4: Simplify right side
    18,878.37x = 287,089,316.70
  5. Step 5: Solve for x
    x = 287,089,316.70/18,878.37
  6. Step 6: Final answer
    x = 15,207.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.