Home / 13,515.53-18,648.11-8,210.03

Finding the Fourth Proportional to 13,515.53, 18,648.11 and 8,210.03

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Solution

The fourth proportional to 13,515.53, 18,648.11 and 8,210.03 is: 11,327.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,515.53 : 18,648.11 = 8,210.03 : x
  2. Step 2: Convert to fraction form
    13,515.53/18,648.11 = 8,210.03/x
  3. Step 3: Cross multiply
    13,515.53x = 18,648.11 × 8,210.03
  4. Step 4: Simplify right side
    13,515.53x = 153,101,501.49
  5. Step 5: Solve for x
    x = 153,101,501.49/13,515.53
  6. Step 6: Final answer
    x = 11,327.82

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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.