Home / 39,678.37-54,756.08-21,529.09

Finding the Fourth Proportional to 39,678.37, 54,756.08 and 21,529.09

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Solution

The fourth proportional to 39,678.37, 54,756.08 and 21,529.09 is: 29,710.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,678.37 : 54,756.08 = 21,529.09 : x
  2. Step 2: Convert to fraction form
    39,678.37/54,756.08 = 21,529.09/x
  3. Step 3: Cross multiply
    39,678.37x = 54,756.08 × 21,529.09
  4. Step 4: Simplify right side
    39,678.37x = 1,178,848,615.90
  5. Step 5: Solve for x
    x = 1,178,848,615.90/39,678.37
  6. Step 6: Final answer
    x = 29,710.10

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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.