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Finding the Fourth Proportional to 30,416.65, 41,987.78 and 18,483.82

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Solution

The fourth proportional to 30,416.65, 41,987.78 and 18,483.82 is: 25,515.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,416.65 : 41,987.78 = 18,483.82 : x
  2. Step 2: Convert to fraction form
    30,416.65/41,987.78 = 18,483.82/x
  3. Step 3: Cross multiply
    30,416.65x = 41,987.78 × 18,483.82
  4. Step 4: Simplify right side
    30,416.65x = 776,094,567.72
  5. Step 5: Solve for x
    x = 776,094,567.72/30,416.65
  6. Step 6: Final answer
    x = 25,515.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.