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Finding the Fourth Proportional to 30,191.80, 45,309.30 and 17,030.20

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Solution

The fourth proportional to 30,191.80, 45,309.30 and 17,030.20 is: 25,557.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,191.80 : 45,309.30 = 17,030.20 : x
  2. Step 2: Convert to fraction form
    30,191.80/45,309.30 = 17,030.20/x
  3. Step 3: Cross multiply
    30,191.80x = 45,309.30 × 17,030.20
  4. Step 4: Simplify right side
    30,191.80x = 771,626,440.86
  5. Step 5: Solve for x
    x = 771,626,440.86/30,191.80
  6. Step 6: Final answer
    x = 25,557.48

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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.