Home / 21,686.40-29,925.79-12,254.36

Finding the Fourth Proportional to 21,686.40, 29,925.79 and 12,254.36

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Solution

The fourth proportional to 21,686.40, 29,925.79 and 12,254.36 is: 16,910.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,686.40 : 29,925.79 = 12,254.36 : x
  2. Step 2: Convert to fraction form
    21,686.40/29,925.79 = 12,254.36/x
  3. Step 3: Cross multiply
    21,686.40x = 29,925.79 × 12,254.36
  4. Step 4: Simplify right side
    21,686.40x = 366,721,223.68
  5. Step 5: Solve for x
    x = 366,721,223.68/21,686.40
  6. Step 6: Final answer
    x = 16,910.19

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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.