Home / 18,780.37-28,175.86-9,409.08

Finding the Fourth Proportional to 18,780.37, 28,175.86 and 9,409.08

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Solution

The fourth proportional to 18,780.37, 28,175.86 and 9,409.08 is: 14,116.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,780.37 : 28,175.86 = 9,409.08 : x
  2. Step 2: Convert to fraction form
    18,780.37/28,175.86 = 9,409.08/x
  3. Step 3: Cross multiply
    18,780.37x = 28,175.86 × 9,409.08
  4. Step 4: Simplify right side
    18,780.37x = 265,108,920.81
  5. Step 5: Solve for x
    x = 265,108,920.81/18,780.37
  6. Step 6: Final answer
    x = 14,116.28

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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.