Home / 21,005.68-31,508.40-6,218.32

Finding the Fourth Proportional to 21,005.68, 31,508.40 and 6,218.32

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Solution

The fourth proportional to 21,005.68, 31,508.40 and 6,218.32 is: 9,327.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.68 : 31,508.40 = 6,218.32 : x
  2. Step 2: Convert to fraction form
    21,005.68/31,508.40 = 6,218.32/x
  3. Step 3: Cross multiply
    21,005.68x = 31,508.40 × 6,218.32
  4. Step 4: Simplify right side
    21,005.68x = 195,929,313.89
  5. Step 5: Solve for x
    x = 195,929,313.89/21,005.68
  6. Step 6: Final answer
    x = 9,327.44

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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.