Home / 39,585.12-54,627.40-21,680.14

Finding the Fourth Proportional to 39,585.12, 54,627.40 and 21,680.14

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Solution

The fourth proportional to 39,585.12, 54,627.40 and 21,680.14 is: 29,918.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,585.12 : 54,627.40 = 21,680.14 : x
  2. Step 2: Convert to fraction form
    39,585.12/54,627.40 = 21,680.14/x
  3. Step 3: Cross multiply
    39,585.12x = 54,627.40 × 21,680.14
  4. Step 4: Simplify right side
    39,585.12x = 1,184,329,679.84
  5. Step 5: Solve for x
    x = 1,184,329,679.84/39,585.12
  6. Step 6: Final answer
    x = 29,918.56

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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.