Home / 13,638.24-18,820.08-7,670.16

Finding the Fourth Proportional to 13,638.24, 18,820.08 and 7,670.16

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Solution

The fourth proportional to 13,638.24, 18,820.08 and 7,670.16 is: 10,584.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.24 : 18,820.08 = 7,670.16 : x
  2. Step 2: Convert to fraction form
    13,638.24/18,820.08 = 7,670.16/x
  3. Step 3: Cross multiply
    13,638.24x = 18,820.08 × 7,670.16
  4. Step 4: Simplify right side
    13,638.24x = 144,353,024.81
  5. Step 5: Solve for x
    x = 144,353,024.81/13,638.24
  6. Step 6: Final answer
    x = 10,584.43

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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.