Home / 39,378.85-54,342.09-21,473.47

Finding the Fourth Proportional to 39,378.85, 54,342.09 and 21,473.47

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Solution

The fourth proportional to 39,378.85, 54,342.09 and 21,473.47 is: 29,632.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,378.85 : 54,342.09 = 21,473.47 : x
  2. Step 2: Convert to fraction form
    39,378.85/54,342.09 = 21,473.47/x
  3. Step 3: Cross multiply
    39,378.85x = 54,342.09 × 21,473.47
  4. Step 4: Simplify right side
    39,378.85x = 1,166,913,239.35
  5. Step 5: Solve for x
    x = 1,166,913,239.35/39,378.85
  6. Step 6: Final answer
    x = 29,632.99

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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.