Home / 30,798.78-42,513.24-18,223.50

Finding the Fourth Proportional to 30,798.78, 42,513.24 and 18,223.50

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Solution

The fourth proportional to 30,798.78, 42,513.24 and 18,223.50 is: 25,154.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,798.78 : 42,513.24 = 18,223.50 : x
  2. Step 2: Convert to fraction form
    30,798.78/42,513.24 = 18,223.50/x
  3. Step 3: Cross multiply
    30,798.78x = 42,513.24 × 18,223.50
  4. Step 4: Simplify right side
    30,798.78x = 774,740,029.14
  5. Step 5: Solve for x
    x = 774,740,029.14/30,798.78
  6. Step 6: Final answer
    x = 25,154.89

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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.