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Finding the Fourth Proportional to 30,148.79, 45,225.34 and 7,961.94

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Solution

The fourth proportional to 30,148.79, 45,225.34 and 7,961.94 is: 11,943.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,148.79 : 45,225.34 = 7,961.94 : x
  2. Step 2: Convert to fraction form
    30,148.79/45,225.34 = 7,961.94/x
  3. Step 3: Cross multiply
    30,148.79x = 45,225.34 × 7,961.94
  4. Step 4: Simplify right side
    30,148.79x = 360,081,423.65
  5. Step 5: Solve for x
    x = 360,081,423.65/30,148.79
  6. Step 6: Final answer
    x = 11,943.48

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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.