Home / 39,687.04-54,768.05-21,782.20

Finding the Fourth Proportional to 39,687.04, 54,768.05 and 21,782.20

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Solution

The fourth proportional to 39,687.04, 54,768.05 and 21,782.20 is: 30,059.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,687.04 : 54,768.05 = 21,782.20 : x
  2. Step 2: Convert to fraction form
    39,687.04/54,768.05 = 21,782.20/x
  3. Step 3: Cross multiply
    39,687.04x = 54,768.05 × 21,782.20
  4. Step 4: Simplify right side
    39,687.04x = 1,192,968,618.71
  5. Step 5: Solve for x
    x = 1,192,968,618.71/39,687.04
  6. Step 6: Final answer
    x = 30,059.40

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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.