Home / 18,880.18-28,430.05-13,984.54

Finding the Fourth Proportional to 18,880.18, 28,430.05 and 13,984.54

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Solution

The fourth proportional to 18,880.18, 28,430.05 and 13,984.54 is: 21,058.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,880.18 : 28,430.05 = 13,984.54 : x
  2. Step 2: Convert to fraction form
    18,880.18/28,430.05 = 13,984.54/x
  3. Step 3: Cross multiply
    18,880.18x = 28,430.05 × 13,984.54
  4. Step 4: Simplify right side
    18,880.18x = 397,581,171.43
  5. Step 5: Solve for x
    x = 397,581,171.43/18,880.18
  6. Step 6: Final answer
    x = 21,058.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.