Home / 39,869.56-55,021.40-21,965.93

Finding the Fourth Proportional to 39,869.56, 55,021.40 and 21,965.93

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Solution

The fourth proportional to 39,869.56, 55,021.40 and 21,965.93 is: 30,313.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,869.56 : 55,021.40 = 21,965.93 : x
  2. Step 2: Convert to fraction form
    39,869.56/55,021.40 = 21,965.93/x
  3. Step 3: Cross multiply
    39,869.56x = 55,021.40 × 21,965.93
  4. Step 4: Simplify right side
    39,869.56x = 1,208,596,000.71
  5. Step 5: Solve for x
    x = 1,208,596,000.71/39,869.56
  6. Step 6: Final answer
    x = 30,313.76

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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.