Home / 39,279.60-54,205.32-21,374.40

Finding the Fourth Proportional to 39,279.60, 54,205.32 and 21,374.40

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Solution

The fourth proportional to 39,279.60, 54,205.32 and 21,374.40 is: 29,496.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,279.60 : 54,205.32 = 21,374.40 : x
  2. Step 2: Convert to fraction form
    39,279.60/54,205.32 = 21,374.40/x
  3. Step 3: Cross multiply
    39,279.60x = 54,205.32 × 21,374.40
  4. Step 4: Simplify right side
    39,279.60x = 1,158,606,191.81
  5. Step 5: Solve for x
    x = 1,158,606,191.81/39,279.60
  6. Step 6: Final answer
    x = 29,496.38

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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.