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Finding the Fourth Proportional to 30,489.60, 45,748.02 and 19,393.40

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Solution

The fourth proportional to 30,489.60, 45,748.02 and 19,393.40 is: 29,098.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,489.60 : 45,748.02 = 19,393.40 : x
  2. Step 2: Convert to fraction form
    30,489.60/45,748.02 = 19,393.40/x
  3. Step 3: Cross multiply
    30,489.60x = 45,748.02 × 19,393.40
  4. Step 4: Simplify right side
    30,489.60x = 887,209,651.07
  5. Step 5: Solve for x
    x = 887,209,651.07/30,489.60
  6. Step 6: Final answer
    x = 29,098.76

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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.