Home / 30,388.51-45,599.78-12,871.45

Finding the Fourth Proportional to 30,388.51, 45,599.78 and 12,871.45

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Solution

The fourth proportional to 30,388.51, 45,599.78 and 12,871.45 is: 19,314.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,388.51 : 45,599.78 = 12,871.45 : x
  2. Step 2: Convert to fraction form
    30,388.51/45,599.78 = 12,871.45/x
  3. Step 3: Cross multiply
    30,388.51x = 45,599.78 × 12,871.45
  4. Step 4: Simplify right side
    30,388.51x = 586,935,288.28
  5. Step 5: Solve for x
    x = 586,935,288.28/30,388.51
  6. Step 6: Final answer
    x = 19,314.38

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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.