Home / 21,070.45-29,078.10-12,117.96

Finding the Fourth Proportional to 21,070.45, 29,078.10 and 12,117.96

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Solution

The fourth proportional to 21,070.45, 29,078.10 and 12,117.96 is: 16,723.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,070.45 : 29,078.10 = 12,117.96 : x
  2. Step 2: Convert to fraction form
    21,070.45/29,078.10 = 12,117.96/x
  3. Step 3: Cross multiply
    21,070.45x = 29,078.10 × 12,117.96
  4. Step 4: Simplify right side
    21,070.45x = 352,367,107.29
  5. Step 5: Solve for x
    x = 352,367,107.29/21,070.45
  6. Step 6: Final answer
    x = 16,723.28

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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.