Home / 30,881.25-42,601.85-18,130.33

Finding the Fourth Proportional to 30,881.25, 42,601.85 and 18,130.33

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Solution

The fourth proportional to 30,881.25, 42,601.85 and 18,130.33 is: 25,011.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,881.25 : 42,601.85 = 18,130.33 : x
  2. Step 2: Convert to fraction form
    30,881.25/42,601.85 = 18,130.33/x
  3. Step 3: Cross multiply
    30,881.25x = 42,601.85 × 18,130.33
  4. Step 4: Simplify right side
    30,881.25x = 772,385,629.70
  5. Step 5: Solve for x
    x = 772,385,629.70/30,881.25
  6. Step 6: Final answer
    x = 25,011.48

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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.