Home / 38,931.80-53,726.99-21,936.20

Finding the Fourth Proportional to 38,931.80, 53,726.99 and 21,936.20

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Solution

The fourth proportional to 38,931.80, 53,726.99 and 21,936.20 is: 30,272.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,931.80 : 53,726.99 = 21,936.20 : x
  2. Step 2: Convert to fraction form
    38,931.80/53,726.99 = 21,936.20/x
  3. Step 3: Cross multiply
    38,931.80x = 53,726.99 × 21,936.20
  4. Step 4: Simplify right side
    38,931.80x = 1,178,565,619.72
  5. Step 5: Solve for x
    x = 1,178,565,619.72/38,931.80
  6. Step 6: Final answer
    x = 30,272.57

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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.