Home / 21,090.12-29,103.47-12,137.93

Finding the Fourth Proportional to 21,090.12, 29,103.47 and 12,137.93

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Solution

The fourth proportional to 21,090.12, 29,103.47 and 12,137.93 is: 16,749.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,090.12 : 29,103.47 = 12,137.93 : x
  2. Step 2: Convert to fraction form
    21,090.12/29,103.47 = 12,137.93/x
  3. Step 3: Cross multiply
    21,090.12x = 29,103.47 × 12,137.93
  4. Step 4: Simplify right side
    21,090.12x = 353,255,675.41
  5. Step 5: Solve for x
    x = 353,255,675.41/21,090.12
  6. Step 6: Final answer
    x = 16,749.82

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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.