Home / 13,151.03-18,154.68-8,438.18

Finding the Fourth Proportional to 13,151.03, 18,154.68 and 8,438.18

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Solution

The fourth proportional to 13,151.03, 18,154.68 and 8,438.18 is: 11,648.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,151.03 : 18,154.68 = 8,438.18 : x
  2. Step 2: Convert to fraction form
    13,151.03/18,154.68 = 8,438.18/x
  3. Step 3: Cross multiply
    13,151.03x = 18,154.68 × 8,438.18
  4. Step 4: Simplify right side
    13,151.03x = 153,192,457.68
  5. Step 5: Solve for x
    x = 153,192,457.68/13,151.03
  6. Step 6: Final answer
    x = 11,648.70

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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.