Home / 39,286.90-54,235.29-30,774.34

Finding the Fourth Proportional to 39,286.90, 54,235.29 and 30,774.34

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Solution

The fourth proportional to 39,286.90, 54,235.29 and 30,774.34 is: 42,483.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,286.90 : 54,235.29 = 30,774.34 : x
  2. Step 2: Convert to fraction form
    39,286.90/54,235.29 = 30,774.34/x
  3. Step 3: Cross multiply
    39,286.90x = 54,235.29 × 30,774.34
  4. Step 4: Simplify right side
    39,286.90x = 1,669,055,254.46
  5. Step 5: Solve for x
    x = 1,669,055,254.46/39,286.90
  6. Step 6: Final answer
    x = 42,483.76

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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.