Home / 13,638.62-18,821.40-7,670.23

Finding the Fourth Proportional to 13,638.62, 18,821.40 and 7,670.23

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Solution

The fourth proportional to 13,638.62, 18,821.40 and 7,670.23 is: 10,584.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.62 : 18,821.40 = 7,670.23 : x
  2. Step 2: Convert to fraction form
    13,638.62/18,821.40 = 7,670.23/x
  3. Step 3: Cross multiply
    13,638.62x = 18,821.40 × 7,670.23
  4. Step 4: Simplify right side
    13,638.62x = 144,364,466.92
  5. Step 5: Solve for x
    x = 144,364,466.92/13,638.62
  6. Step 6: Final answer
    x = 10,584.98

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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.