Home / 28,125.20-42,144.60-18,880.40

Finding the Fourth Proportional to 28,125.20, 42,144.60 and 18,880.40

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Solution

The fourth proportional to 28,125.20, 42,144.60 and 18,880.40 is: 28,291.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,125.20 : 42,144.60 = 18,880.40 : x
  2. Step 2: Convert to fraction form
    28,125.20/42,144.60 = 18,880.40/x
  3. Step 3: Cross multiply
    28,125.20x = 42,144.60 × 18,880.40
  4. Step 4: Simplify right side
    28,125.20x = 795,706,905.84
  5. Step 5: Solve for x
    x = 795,706,905.84/28,125.20
  6. Step 6: Final answer
    x = 28,291.60

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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.