Home / 39,120.44-53,985.84-21,215.84

Finding the Fourth Proportional to 39,120.44, 53,985.84 and 21,215.84

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Solution

The fourth proportional to 39,120.44, 53,985.84 and 21,215.84 is: 29,277.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,120.44 : 53,985.84 = 21,215.84 : x
  2. Step 2: Convert to fraction form
    39,120.44/53,985.84 = 21,215.84/x
  3. Step 3: Cross multiply
    39,120.44x = 53,985.84 × 21,215.84
  4. Step 4: Simplify right side
    39,120.44x = 1,145,354,943.71
  5. Step 5: Solve for x
    x = 1,145,354,943.71/39,120.44
  6. Step 6: Final answer
    x = 29,277.66

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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.