Home / 39,783.68-59,678.08-13,479.36

Finding the Fourth Proportional to 39,783.68, 59,678.08 and 13,479.36

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Solution

The fourth proportional to 39,783.68, 59,678.08 and 13,479.36 is: 20,219.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,783.68 : 59,678.08 = 13,479.36 : x
  2. Step 2: Convert to fraction form
    39,783.68/59,678.08 = 13,479.36/x
  3. Step 3: Cross multiply
    39,783.68x = 59,678.08 × 13,479.36
  4. Step 4: Simplify right side
    39,783.68x = 804,422,324.43
  5. Step 5: Solve for x
    x = 804,422,324.43/39,783.68
  6. Step 6: Final answer
    x = 20,219.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.