Home / 39,777.12-54,891.36-21,870.72

Finding the Fourth Proportional to 39,777.12, 54,891.36 and 21,870.72

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Solution

The fourth proportional to 39,777.12, 54,891.36 and 21,870.72 is: 30,181.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,777.12 : 54,891.36 = 21,870.72 : x
  2. Step 2: Convert to fraction form
    39,777.12/54,891.36 = 21,870.72/x
  3. Step 3: Cross multiply
    39,777.12x = 54,891.36 × 21,870.72
  4. Step 4: Simplify right side
    39,777.12x = 1,200,513,564.98
  5. Step 5: Solve for x
    x = 1,200,513,564.98/39,777.12
  6. Step 6: Final answer
    x = 30,181.01

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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.