Home / 39,875.85-55,031.79-21,974.06

Finding the Fourth Proportional to 39,875.85, 55,031.79 and 21,974.06

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Solution

The fourth proportional to 39,875.85, 55,031.79 and 21,974.06 is: 30,325.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,875.85 : 55,031.79 = 21,974.06 : x
  2. Step 2: Convert to fraction form
    39,875.85/55,031.79 = 21,974.06/x
  3. Step 3: Cross multiply
    39,875.85x = 55,031.79 × 21,974.06
  4. Step 4: Simplify right side
    39,875.85x = 1,209,271,580.21
  5. Step 5: Solve for x
    x = 1,209,271,580.21/39,875.85
  6. Step 6: Final answer
    x = 30,325.91

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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.