Home / 21,745.68-30,002.40-12,312.48

Finding the Fourth Proportional to 21,745.68, 30,002.40 and 12,312.48

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Solution

The fourth proportional to 21,745.68, 30,002.40 and 12,312.48 is: 16,987.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,745.68 : 30,002.40 = 12,312.48 : x
  2. Step 2: Convert to fraction form
    21,745.68/30,002.40 = 12,312.48/x
  3. Step 3: Cross multiply
    21,745.68x = 30,002.40 × 12,312.48
  4. Step 4: Simplify right side
    21,745.68x = 369,403,949.95
  5. Step 5: Solve for x
    x = 369,403,949.95/21,745.68
  6. Step 6: Final answer
    x = 16,987.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.