Home / 39,731.68-54,830.28-21,828.34

Finding the Fourth Proportional to 39,731.68, 54,830.28 and 21,828.34

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Solution

The fourth proportional to 39,731.68, 54,830.28 and 21,828.34 is: 30,123.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,731.68 : 54,830.28 = 21,828.34 : x
  2. Step 2: Convert to fraction form
    39,731.68/54,830.28 = 21,828.34/x
  3. Step 3: Cross multiply
    39,731.68x = 54,830.28 × 21,828.34
  4. Step 4: Simplify right side
    39,731.68x = 1,196,853,994.14
  5. Step 5: Solve for x
    x = 1,196,853,994.14/39,731.68
  6. Step 6: Final answer
    x = 30,123.42

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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.