Home / 30,738.81-42,421.73-17,127.76

Finding the Fourth Proportional to 30,738.81, 42,421.73 and 17,127.76

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Solution

The fourth proportional to 30,738.81, 42,421.73 and 17,127.76 is: 23,637.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,738.81 : 42,421.73 = 17,127.76 : x
  2. Step 2: Convert to fraction form
    30,738.81/42,421.73 = 17,127.76/x
  3. Step 3: Cross multiply
    30,738.81x = 42,421.73 × 17,127.76
  4. Step 4: Simplify right side
    30,738.81x = 726,589,057.32
  5. Step 5: Solve for x
    x = 726,589,057.32/30,738.81
  6. Step 6: Final answer
    x = 23,637.51

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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.