Home / 30,661.32-42,313.00-18,561.64

Finding the Fourth Proportional to 30,661.32, 42,313.00 and 18,561.64

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Solution

The fourth proportional to 30,661.32, 42,313.00 and 18,561.64 is: 25,615.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,661.32 : 42,313.00 = 18,561.64 : x
  2. Step 2: Convert to fraction form
    30,661.32/42,313.00 = 18,561.64/x
  3. Step 3: Cross multiply
    30,661.32x = 42,313.00 × 18,561.64
  4. Step 4: Simplify right side
    30,661.32x = 785,398,696.52
  5. Step 5: Solve for x
    x = 785,398,696.52/30,661.32
  6. Step 6: Final answer
    x = 25,615.29

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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.