Home / 21,018.12-29,005.23-11,587.02

Finding the Fourth Proportional to 21,018.12, 29,005.23 and 11,587.02

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Solution

The fourth proportional to 21,018.12, 29,005.23 and 11,587.02 is: 15,990.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.12 : 29,005.23 = 11,587.02 : x
  2. Step 2: Convert to fraction form
    21,018.12/29,005.23 = 11,587.02/x
  3. Step 3: Cross multiply
    21,018.12x = 29,005.23 × 11,587.02
  4. Step 4: Simplify right side
    21,018.12x = 336,084,180.11
  5. Step 5: Solve for x
    x = 336,084,180.11/21,018.12
  6. Step 6: Final answer
    x = 15,990.21

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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.