Home / 38,928.80-53,715.99-21,929.64

Finding the Fourth Proportional to 38,928.80, 53,715.99 and 21,929.64

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Solution

The fourth proportional to 38,928.80, 53,715.99 and 21,929.64 is: 30,259.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,928.80 : 53,715.99 = 21,929.64 : x
  2. Step 2: Convert to fraction form
    38,928.80/53,715.99 = 21,929.64/x
  3. Step 3: Cross multiply
    38,928.80x = 53,715.99 × 21,929.64
  4. Step 4: Simplify right side
    38,928.80x = 1,177,972,203.74
  5. Step 5: Solve for x
    x = 1,177,972,203.74/38,928.80
  6. Step 6: Final answer
    x = 30,259.66

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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.