Home / 39,378.19-54,343.21-21,474.17

Finding the Fourth Proportional to 39,378.19, 54,343.21 and 21,474.17

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Solution

The fourth proportional to 39,378.19, 54,343.21 and 21,474.17 is: 29,635.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,378.19 : 54,343.21 = 21,474.17 : x
  2. Step 2: Convert to fraction form
    39,378.19/54,343.21 = 21,474.17/x
  3. Step 3: Cross multiply
    39,378.19x = 54,343.21 × 21,474.17
  4. Step 4: Simplify right side
    39,378.19x = 1,166,975,329.89
  5. Step 5: Solve for x
    x = 1,166,975,329.89/39,378.19
  6. Step 6: Final answer
    x = 29,635.07

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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.