Home / 21,256.60-31,878.10-7,021.92

Finding the Fourth Proportional to 21,256.60, 31,878.10 and 7,021.92

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Solution

The fourth proportional to 21,256.60, 31,878.10 and 7,021.92 is: 10,530.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,256.60 : 31,878.10 = 7,021.92 : x
  2. Step 2: Convert to fraction form
    21,256.60/31,878.10 = 7,021.92/x
  3. Step 3: Cross multiply
    21,256.60x = 31,878.10 × 7,021.92
  4. Step 4: Simplify right side
    21,256.60x = 223,845,467.95
  5. Step 5: Solve for x
    x = 223,845,467.95/21,256.60
  6. Step 6: Final answer
    x = 10,530.63

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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.