Home / 39,279.32-54,205.12-21,374.34

Finding the Fourth Proportional to 39,279.32, 54,205.12 and 21,374.34

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Solution

The fourth proportional to 39,279.32, 54,205.12 and 21,374.34 is: 29,496.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,279.32 : 54,205.12 = 21,374.34 : x
  2. Step 2: Convert to fraction form
    39,279.32/54,205.12 = 21,374.34/x
  3. Step 3: Cross multiply
    39,279.32x = 54,205.12 × 21,374.34
  4. Step 4: Simplify right side
    39,279.32x = 1,158,598,622.55
  5. Step 5: Solve for x
    x = 1,158,598,622.55/39,279.32
  6. Step 6: Final answer
    x = 29,496.40

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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.