Home / 39,965.91-59,966.55-20,986.08

Finding the Fourth Proportional to 39,965.91, 59,966.55 and 20,986.08

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Solution

The fourth proportional to 39,965.91, 59,966.55 and 20,986.08 is: 31,488.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,965.91 : 59,966.55 = 20,986.08 : x
  2. Step 2: Convert to fraction form
    39,965.91/59,966.55 = 20,986.08/x
  3. Step 3: Cross multiply
    39,965.91x = 59,966.55 × 20,986.08
  4. Step 4: Simplify right side
    39,965.91x = 1,258,462,815.62
  5. Step 5: Solve for x
    x = 1,258,462,815.62/39,965.91
  6. Step 6: Final answer
    x = 31,488.41

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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.