Home / 39,438.54-54,423-21,529.98

Finding the Fourth Proportional to 39,438.54, 54,423 and 21,529.98

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Solution

The fourth proportional to 39,438.54, 54,423 and 21,529.98 is: 29,710.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,438.54 : 54,423 = 21,529.98 : x
  2. Step 2: Convert to fraction form
    39,438.54/54,423 = 21,529.98/x
  3. Step 3: Cross multiply
    39,438.54x = 54,423 × 21,529.98
  4. Step 4: Simplify right side
    39,438.54x = 1,171,726,101.54
  5. Step 5: Solve for x
    x = 1,171,726,101.54/39,438.54
  6. Step 6: Final answer
    x = 29,710.18

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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.