Home / 30,690.23-42,338.21-19,934.37

Finding the Fourth Proportional to 30,690.23, 42,338.21 and 19,934.37

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Solution

The fourth proportional to 30,690.23, 42,338.21 and 19,934.37 is: 27,500.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,690.23 : 42,338.21 = 19,934.37 : x
  2. Step 2: Convert to fraction form
    30,690.23/42,338.21 = 19,934.37/x
  3. Step 3: Cross multiply
    30,690.23x = 42,338.21 × 19,934.37
  4. Step 4: Simplify right side
    30,690.23x = 843,985,443.61
  5. Step 5: Solve for x
    x = 843,985,443.61/30,690.23
  6. Step 6: Final answer
    x = 27,500.14

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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.