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Finding the Fourth Proportional to 30,191.76, 45,302.64 and 20,203.08

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Solution

The fourth proportional to 30,191.76, 45,302.64 and 20,203.08 is: 30,314.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,191.76 : 45,302.64 = 20,203.08 : x
  2. Step 2: Convert to fraction form
    30,191.76/45,302.64 = 20,203.08/x
  3. Step 3: Cross multiply
    30,191.76x = 45,302.64 × 20,203.08
  4. Step 4: Simplify right side
    30,191.76x = 915,252,860.13
  5. Step 5: Solve for x
    x = 915,252,860.13/30,191.76
  6. Step 6: Final answer
    x = 30,314.66

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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.