Home / 13,321.71-19,989.56-5,430.08

Finding the Fourth Proportional to 13,321.71, 19,989.56 and 5,430.08

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Solution

The fourth proportional to 13,321.71, 19,989.56 and 5,430.08 is: 8,147.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,321.71 : 19,989.56 = 5,430.08 : x
  2. Step 2: Convert to fraction form
    13,321.71/19,989.56 = 5,430.08/x
  3. Step 3: Cross multiply
    13,321.71x = 19,989.56 × 5,430.08
  4. Step 4: Simplify right side
    13,321.71x = 108,544,782.87
  5. Step 5: Solve for x
    x = 108,544,782.87/13,321.71
  6. Step 6: Final answer
    x = 8,147.96

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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.