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Finding the Fourth Proportional to 30,165.40, 45,246.48 and 7,979.50

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Solution

The fourth proportional to 30,165.40, 45,246.48 and 7,979.50 is: 11,968.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,165.40 : 45,246.48 = 7,979.50 : x
  2. Step 2: Convert to fraction form
    30,165.40/45,246.48 = 7,979.50/x
  3. Step 3: Cross multiply
    30,165.40x = 45,246.48 × 7,979.50
  4. Step 4: Simplify right side
    30,165.40x = 361,044,287.16
  5. Step 5: Solve for x
    x = 361,044,287.16/30,165.40
  6. Step 6: Final answer
    x = 11,968.82

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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.