Home / 21,083.12-29,095.80-12,130.64

Finding the Fourth Proportional to 21,083.12, 29,095.80 and 12,130.64

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Solution

The fourth proportional to 21,083.12, 29,095.80 and 12,130.64 is: 16,740.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,083.12 : 29,095.80 = 12,130.64 : x
  2. Step 2: Convert to fraction form
    21,083.12/29,095.80 = 12,130.64/x
  3. Step 3: Cross multiply
    21,083.12x = 29,095.80 × 12,130.64
  4. Step 4: Simplify right side
    21,083.12x = 352,950,675.31
  5. Step 5: Solve for x
    x = 352,950,675.31/21,083.12
  6. Step 6: Final answer
    x = 16,740.91

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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.