Home / 18,911.40-28,328.70-8,765.32

Finding the Fourth Proportional to 18,911.40, 28,328.70 and 8,765.32

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Solution

The fourth proportional to 18,911.40, 28,328.70 and 8,765.32 is: 13,130.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,911.40 : 28,328.70 = 8,765.32 : x
  2. Step 2: Convert to fraction form
    18,911.40/28,328.70 = 8,765.32/x
  3. Step 3: Cross multiply
    18,911.40x = 28,328.70 × 8,765.32
  4. Step 4: Simplify right side
    18,911.40x = 248,310,120.68
  5. Step 5: Solve for x
    x = 248,310,120.68/18,911.40
  6. Step 6: Final answer
    x = 13,130.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.