Home / 30,663.30-42,315.78-18,563.64

Finding the Fourth Proportional to 30,663.30, 42,315.78 and 18,563.64

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Solution

The fourth proportional to 30,663.30, 42,315.78 and 18,563.64 is: 25,618.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,663.30 : 42,315.78 = 18,563.64 : x
  2. Step 2: Convert to fraction form
    30,663.30/42,315.78 = 18,563.64/x
  3. Step 3: Cross multiply
    30,663.30x = 42,315.78 × 18,563.64
  4. Step 4: Simplify right side
    30,663.30x = 785,534,906.24
  5. Step 5: Solve for x
    x = 785,534,906.24/30,663.30
  6. Step 6: Final answer
    x = 25,618.08

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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.