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Finding the Fourth Proportional to 30,319.20, 45,360 and 19,951.20

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Solution

The fourth proportional to 30,319.20, 45,360 and 19,951.20 is: 29,848.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,319.20 : 45,360 = 19,951.20 : x
  2. Step 2: Convert to fraction form
    30,319.20/45,360 = 19,951.20/x
  3. Step 3: Cross multiply
    30,319.20x = 45,360 × 19,951.20
  4. Step 4: Simplify right side
    30,319.20x = 904,986,432
  5. Step 5: Solve for x
    x = 904,986,432/30,319.20
  6. Step 6: Final answer
    x = 29,848.63

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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.