Home / 13,638.93-18,821.60-7,670.64

Finding the Fourth Proportional to 13,638.93, 18,821.60 and 7,670.64

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Solution

The fourth proportional to 13,638.93, 18,821.60 and 7,670.64 is: 10,585.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.93 : 18,821.60 = 7,670.64 : x
  2. Step 2: Convert to fraction form
    13,638.93/18,821.60 = 7,670.64/x
  3. Step 3: Cross multiply
    13,638.93x = 18,821.60 × 7,670.64
  4. Step 4: Simplify right side
    13,638.93x = 144,373,717.82
  5. Step 5: Solve for x
    x = 144,373,717.82/13,638.93
  6. Step 6: Final answer
    x = 10,585.41

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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.