Home / 30,840.09-42,560.15-18,736.45

Finding the Fourth Proportional to 30,840.09, 42,560.15 and 18,736.45

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Solution

The fourth proportional to 30,840.09, 42,560.15 and 18,736.45 is: 25,856.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,840.09 : 42,560.15 = 18,736.45 : x
  2. Step 2: Convert to fraction form
    30,840.09/42,560.15 = 18,736.45/x
  3. Step 3: Cross multiply
    30,840.09x = 42,560.15 × 18,736.45
  4. Step 4: Simplify right side
    30,840.09x = 797,426,122.47
  5. Step 5: Solve for x
    x = 797,426,122.47/30,840.09
  6. Step 6: Final answer
    x = 25,856.81

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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.