Home / 39,485.81-54,490.32-21,580.94

Finding the Fourth Proportional to 39,485.81, 54,490.32 and 21,580.94

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Solution

The fourth proportional to 39,485.81, 54,490.32 and 21,580.94 is: 29,781.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,485.81 : 54,490.32 = 21,580.94 : x
  2. Step 2: Convert to fraction form
    39,485.81/54,490.32 = 21,580.94/x
  3. Step 3: Cross multiply
    39,485.81x = 54,490.32 × 21,580.94
  4. Step 4: Simplify right side
    39,485.81x = 1,175,952,309.47
  5. Step 5: Solve for x
    x = 1,175,952,309.47/39,485.81
  6. Step 6: Final answer
    x = 29,781.64

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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.