Home / 13,489.30-18,607.21-10,500.40

Finding the Fourth Proportional to 13,489.30, 18,607.21 and 10,500.40

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Solution

The fourth proportional to 13,489.30, 18,607.21 and 10,500.40 is: 14,484.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,489.30 : 18,607.21 = 10,500.40 : x
  2. Step 2: Convert to fraction form
    13,489.30/18,607.21 = 10,500.40/x
  3. Step 3: Cross multiply
    13,489.30x = 18,607.21 × 10,500.40
  4. Step 4: Simplify right side
    13,489.30x = 195,383,147.88
  5. Step 5: Solve for x
    x = 195,383,147.88/13,489.30
  6. Step 6: Final answer
    x = 14,484.31

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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.