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Finding the Fourth Proportional to 30,460.81, 45,644.09 and 21,119.08

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Solution

The fourth proportional to 30,460.81, 45,644.09 and 21,119.08 is: 31,645.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,460.81 : 45,644.09 = 21,119.08 : x
  2. Step 2: Convert to fraction form
    30,460.81/45,644.09 = 21,119.08/x
  3. Step 3: Cross multiply
    30,460.81x = 45,644.09 × 21,119.08
  4. Step 4: Simplify right side
    30,460.81x = 963,960,968.53
  5. Step 5: Solve for x
    x = 963,960,968.53/30,460.81
  6. Step 6: Final answer
    x = 31,645.94

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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.