Home / 39,142.80-54,017.28-21,237.84

Finding the Fourth Proportional to 39,142.80, 54,017.28 and 21,237.84

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Solution

The fourth proportional to 39,142.80, 54,017.28 and 21,237.84 is: 29,308.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,142.80 : 54,017.28 = 21,237.84 : x
  2. Step 2: Convert to fraction form
    39,142.80/54,017.28 = 21,237.84/x
  3. Step 3: Cross multiply
    39,142.80x = 54,017.28 × 21,237.84
  4. Step 4: Simplify right side
    39,142.80x = 1,147,210,349.88
  5. Step 5: Solve for x
    x = 1,147,210,349.88/39,142.80
  6. Step 6: Final answer
    x = 29,308.34

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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.