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Finding the Fourth Proportional to 30,509.88, 42,101.66 and 17,081.03

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Solution

The fourth proportional to 30,509.88, 42,101.66 and 17,081.03 is: 23,570.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,509.88 : 42,101.66 = 17,081.03 : x
  2. Step 2: Convert to fraction form
    30,509.88/42,101.66 = 17,081.03/x
  3. Step 3: Cross multiply
    30,509.88x = 42,101.66 × 17,081.03
  4. Step 4: Simplify right side
    30,509.88x = 719,139,421.60
  5. Step 5: Solve for x
    x = 719,139,421.60/30,509.88
  6. Step 6: Final answer
    x = 23,570.71

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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.