Home / 39,870.46-55,023.76-21,965.48

Finding the Fourth Proportional to 39,870.46, 55,023.76 and 21,965.48

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Solution

The fourth proportional to 39,870.46, 55,023.76 and 21,965.48 is: 30,313.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,870.46 : 55,023.76 = 21,965.48 : x
  2. Step 2: Convert to fraction form
    39,870.46/55,023.76 = 21,965.48/x
  3. Step 3: Cross multiply
    39,870.46x = 55,023.76 × 21,965.48
  4. Step 4: Simplify right side
    39,870.46x = 1,208,623,299.80
  5. Step 5: Solve for x
    x = 1,208,623,299.80/39,870.46
  6. Step 6: Final answer
    x = 30,313.75

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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.