Home / 39,121.46-53,987.61-21,216.50

Finding the Fourth Proportional to 39,121.46, 53,987.61 and 21,216.50

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Solution

The fourth proportional to 39,121.46, 53,987.61 and 21,216.50 is: 29,278.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,121.46 : 53,987.61 = 21,216.50 : x
  2. Step 2: Convert to fraction form
    39,121.46/53,987.61 = 21,216.50/x
  3. Step 3: Cross multiply
    39,121.46x = 53,987.61 × 21,216.50
  4. Step 4: Simplify right side
    39,121.46x = 1,145,428,127.57
  5. Step 5: Solve for x
    x = 1,145,428,127.57/39,121.46
  6. Step 6: Final answer
    x = 29,278.77

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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.