Home / 30,721.99-42,396.36-17,977.63

Finding the Fourth Proportional to 30,721.99, 42,396.36 and 17,977.63

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Solution

The fourth proportional to 30,721.99, 42,396.36 and 17,977.63 is: 24,809.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,721.99 : 42,396.36 = 17,977.63 : x
  2. Step 2: Convert to fraction form
    30,721.99/42,396.36 = 17,977.63/x
  3. Step 3: Cross multiply
    30,721.99x = 42,396.36 × 17,977.63
  4. Step 4: Simplify right side
    30,721.99x = 762,185,961.40
  5. Step 5: Solve for x
    x = 762,185,961.40/30,721.99
  6. Step 6: Final answer
    x = 24,809.13

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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.