Home / 21,308.70-31,926.60-13,508.40

Finding the Fourth Proportional to 21,308.70, 31,926.60 and 13,508.40

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Solution

The fourth proportional to 21,308.70, 31,926.60 and 13,508.40 is: 20,239.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,308.70 : 31,926.60 = 13,508.40 : x
  2. Step 2: Convert to fraction form
    21,308.70/31,926.60 = 13,508.40/x
  3. Step 3: Cross multiply
    21,308.70x = 31,926.60 × 13,508.40
  4. Step 4: Simplify right side
    21,308.70x = 431,277,283.44
  5. Step 5: Solve for x
    x = 431,277,283.44/21,308.70
  6. Step 6: Final answer
    x = 20,239.49

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1.5x scale

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.