Home / 39,119.94-53,985.15-21,215.34

Finding the Fourth Proportional to 39,119.94, 53,985.15 and 21,215.34

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Solution

The fourth proportional to 39,119.94, 53,985.15 and 21,215.34 is: 29,276.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,119.94 : 53,985.15 = 21,215.34 : x
  2. Step 2: Convert to fraction form
    39,119.94/53,985.15 = 21,215.34/x
  3. Step 3: Cross multiply
    39,119.94x = 53,985.15 × 21,215.34
  4. Step 4: Simplify right side
    39,119.94x = 1,145,313,312.20
  5. Step 5: Solve for x
    x = 1,145,313,312.20/39,119.94
  6. Step 6: Final answer
    x = 29,276.97

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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.