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Finding the Fourth Proportional to 20,430.88, 30,643.99 and 7,101.32

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Solution

The fourth proportional to 20,430.88, 30,643.99 and 7,101.32 is: 10,651.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.88 : 30,643.99 = 7,101.32 : x
  2. Step 2: Convert to fraction form
    20,430.88/30,643.99 = 7,101.32/x
  3. Step 3: Cross multiply
    20,430.88x = 30,643.99 × 7,101.32
  4. Step 4: Simplify right side
    20,430.88x = 217,612,608.09
  5. Step 5: Solve for x
    x = 217,612,608.09/20,430.88
  6. Step 6: Final answer
    x = 10,651.16

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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.