Home / 39,774.57-54,888.93-21,870.78

Finding the Fourth Proportional to 39,774.57, 54,888.93 and 21,870.78

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Solution

The fourth proportional to 39,774.57, 54,888.93 and 21,870.78 is: 30,181.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,774.57 : 54,888.93 = 21,870.78 : x
  2. Step 2: Convert to fraction form
    39,774.57/54,888.93 = 21,870.78/x
  3. Step 3: Cross multiply
    39,774.57x = 54,888.93 × 21,870.78
  4. Step 4: Simplify right side
    39,774.57x = 1,200,463,712.47
  5. Step 5: Solve for x
    x = 1,200,463,712.47/39,774.57
  6. Step 6: Final answer
    x = 30,181.69

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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.