Home / 18,999.74-28,496.28-5,145.50

Finding the Fourth Proportional to 18,999.74, 28,496.28 and 5,145.50

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Solution

The fourth proportional to 18,999.74, 28,496.28 and 5,145.50 is: 7,717.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.74 : 28,496.28 = 5,145.50 : x
  2. Step 2: Convert to fraction form
    18,999.74/28,496.28 = 5,145.50/x
  3. Step 3: Cross multiply
    18,999.74x = 28,496.28 × 5,145.50
  4. Step 4: Simplify right side
    18,999.74x = 146,627,608.74
  5. Step 5: Solve for x
    x = 146,627,608.74/18,999.74
  6. Step 6: Final answer
    x = 7,717.35

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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.