Home / 21,521.82-29,702.67-12,090.36

Finding the Fourth Proportional to 21,521.82, 29,702.67 and 12,090.36

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Solution

The fourth proportional to 21,521.82, 29,702.67 and 12,090.36 is: 16,686.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,521.82 : 29,702.67 = 12,090.36 : x
  2. Step 2: Convert to fraction form
    21,521.82/29,702.67 = 12,090.36/x
  3. Step 3: Cross multiply
    21,521.82x = 29,702.67 × 12,090.36
  4. Step 4: Simplify right side
    21,521.82x = 359,115,973.26
  5. Step 5: Solve for x
    x = 359,115,973.26/21,521.82
  6. Step 6: Final answer
    x = 16,686.13

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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.