Home / 39,964.91-59,965.05-20,985.08

Finding the Fourth Proportional to 39,964.91, 59,965.05 and 20,985.08

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Solution

The fourth proportional to 39,964.91, 59,965.05 and 20,985.08 is: 31,486.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,964.91 : 59,965.05 = 20,985.08 : x
  2. Step 2: Convert to fraction form
    39,964.91/59,965.05 = 20,985.08/x
  3. Step 3: Cross multiply
    39,964.91x = 59,965.05 × 20,985.08
  4. Step 4: Simplify right side
    39,964.91x = 1,258,371,371.45
  5. Step 5: Solve for x
    x = 1,258,371,371.45/39,964.91
  6. Step 6: Final answer
    x = 31,486.91

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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.