Home / 21,015.15-29,000.66-11,583.51

Finding the Fourth Proportional to 21,015.15, 29,000.66 and 11,583.51

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Solution

The fourth proportional to 21,015.15, 29,000.66 and 11,583.51 is: 15,985.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,015.15 : 29,000.66 = 11,583.51 : x
  2. Step 2: Convert to fraction form
    21,015.15/29,000.66 = 11,583.51/x
  3. Step 3: Cross multiply
    21,015.15x = 29,000.66 × 11,583.51
  4. Step 4: Simplify right side
    21,015.15x = 335,929,377.20
  5. Step 5: Solve for x
    x = 335,929,377.20/21,015.15
  6. Step 6: Final answer
    x = 15,985.10

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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.