Home / 5,619.52-8,430.59-1,921.78

Finding the Fourth Proportional to 5,619.52, 8,430.59 and 1,921.78

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Solution

The fourth proportional to 5,619.52, 8,430.59 and 1,921.78 is: 2,883.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,619.52 : 8,430.59 = 1,921.78 : x
  2. Step 2: Convert to fraction form
    5,619.52/8,430.59 = 1,921.78/x
  3. Step 3: Cross multiply
    5,619.52x = 8,430.59 × 1,921.78
  4. Step 4: Simplify right side
    5,619.52x = 16,201,722.98
  5. Step 5: Solve for x
    x = 16,201,722.98/5,619.52
  6. Step 6: Final answer
    x = 2,883.12

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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.