Home / 39,478.32-54,480.79-21,574.08

Finding the Fourth Proportional to 39,478.32, 54,480.79 and 21,574.08

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Solution

The fourth proportional to 39,478.32, 54,480.79 and 21,574.08 is: 29,772.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,478.32 : 54,480.79 = 21,574.08 : x
  2. Step 2: Convert to fraction form
    39,478.32/54,480.79 = 21,574.08/x
  3. Step 3: Cross multiply
    39,478.32x = 54,480.79 × 21,574.08
  4. Step 4: Simplify right side
    39,478.32x = 1,175,372,921.92
  5. Step 5: Solve for x
    x = 1,175,372,921.92/39,478.32
  6. Step 6: Final answer
    x = 29,772.62

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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.