Home / 21,148.06-31,714.80-7,105.90

Finding the Fourth Proportional to 21,148.06, 31,714.80 and 7,105.90

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Solution

The fourth proportional to 21,148.06, 31,714.80 and 7,105.90 is: 10,656.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,148.06 : 31,714.80 = 7,105.90 : x
  2. Step 2: Convert to fraction form
    21,148.06/31,714.80 = 7,105.90/x
  3. Step 3: Cross multiply
    21,148.06x = 31,714.80 × 7,105.90
  4. Step 4: Simplify right side
    21,148.06x = 225,362,197.32
  5. Step 5: Solve for x
    x = 225,362,197.32/21,148.06
  6. Step 6: Final answer
    x = 10,656.40

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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.