Home / 30,453.84-42,015.88-18,513.36

Finding the Fourth Proportional to 30,453.84, 42,015.88 and 18,513.36

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Solution

The fourth proportional to 30,453.84, 42,015.88 and 18,513.36 is: 25,542.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,453.84 : 42,015.88 = 18,513.36 : x
  2. Step 2: Convert to fraction form
    30,453.84/42,015.88 = 18,513.36/x
  3. Step 3: Cross multiply
    30,453.84x = 42,015.88 × 18,513.36
  4. Step 4: Simplify right side
    30,453.84x = 777,855,112.16
  5. Step 5: Solve for x
    x = 777,855,112.16/30,453.84
  6. Step 6: Final answer
    x = 25,542.10

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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.