Home / 39,681.81-54,759.18-21,777.12

Finding the Fourth Proportional to 39,681.81, 54,759.18 and 21,777.12

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Solution

The fourth proportional to 39,681.81, 54,759.18 and 21,777.12 is: 30,051.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,681.81 : 54,759.18 = 21,777.12 : x
  2. Step 2: Convert to fraction form
    39,681.81/54,759.18 = 21,777.12/x
  3. Step 3: Cross multiply
    39,681.81x = 54,759.18 × 21,777.12
  4. Step 4: Simplify right side
    39,681.81x = 1,192,496,987.78
  5. Step 5: Solve for x
    x = 1,192,496,987.78/39,681.81
  6. Step 6: Final answer
    x = 30,051.48

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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.