Home / 39,427.32-54,406.62-21,521.28

Finding the Fourth Proportional to 39,427.32, 54,406.62 and 21,521.28

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Solution

The fourth proportional to 39,427.32, 54,406.62 and 21,521.28 is: 29,697.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,427.32 : 54,406.62 = 21,521.28 : x
  2. Step 2: Convert to fraction form
    39,427.32/54,406.62 = 21,521.28/x
  3. Step 3: Cross multiply
    39,427.32x = 54,406.62 × 21,521.28
  4. Step 4: Simplify right side
    39,427.32x = 1,170,900,102.87
  5. Step 5: Solve for x
    x = 1,170,900,102.87/39,427.32
  6. Step 6: Final answer
    x = 29,697.68

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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.