Home / 18,880.06-28,302.40-6,391.34

Finding the Fourth Proportional to 18,880.06, 28,302.40 and 6,391.34

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Solution

The fourth proportional to 18,880.06, 28,302.40 and 6,391.34 is: 9,581.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,880.06 : 28,302.40 = 6,391.34 : x
  2. Step 2: Convert to fraction form
    18,880.06/28,302.40 = 6,391.34/x
  3. Step 3: Cross multiply
    18,880.06x = 28,302.40 × 6,391.34
  4. Step 4: Simplify right side
    18,880.06x = 180,890,261.22
  5. Step 5: Solve for x
    x = 180,890,261.22/18,880.06
  6. Step 6: Final answer
    x = 9,581.02

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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.