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Finding the Fourth Proportional to 30,686, 42,343.08 and 17,256.56

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Solution

The fourth proportional to 30,686, 42,343.08 and 17,256.56 is: 23,812.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,686 : 42,343.08 = 17,256.56 : x
  2. Step 2: Convert to fraction form
    30,686/42,343.08 = 17,256.56/x
  3. Step 3: Cross multiply
    30,686x = 42,343.08 × 17,256.56
  4. Step 4: Simplify right side
    30,686x = 730,695,900.60
  5. Step 5: Solve for x
    x = 730,695,900.60/30,686
  6. Step 6: Final answer
    x = 23,812.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.