Home / 21,018.88-31,506.40-7,865.52

Finding the Fourth Proportional to 21,018.88, 31,506.40 and 7,865.52

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Solution

The fourth proportional to 21,018.88, 31,506.40 and 7,865.52 is: 11,790.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.88 : 31,506.40 = 7,865.52 : x
  2. Step 2: Convert to fraction form
    21,018.88/31,506.40 = 7,865.52/x
  3. Step 3: Cross multiply
    21,018.88x = 31,506.40 × 7,865.52
  4. Step 4: Simplify right side
    21,018.88x = 247,814,219.33
  5. Step 5: Solve for x
    x = 247,814,219.33/21,018.88
  6. Step 6: Final answer
    x = 11,790.08

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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.