Home / 30,871.72-42,600.44-18,123.52

Finding the Fourth Proportional to 30,871.72, 42,600.44 and 18,123.52

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Solution

The fourth proportional to 30,871.72, 42,600.44 and 18,123.52 is: 25,008.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,871.72 : 42,600.44 = 18,123.52 : x
  2. Step 2: Convert to fraction form
    30,871.72/42,600.44 = 18,123.52/x
  3. Step 3: Cross multiply
    30,871.72x = 42,600.44 × 18,123.52
  4. Step 4: Simplify right side
    30,871.72x = 772,069,926.35
  5. Step 5: Solve for x
    x = 772,069,926.35/30,871.72
  6. Step 6: Final answer
    x = 25,008.97

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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.