Home / 21,018.76-29,006.04-11,587.48

Finding the Fourth Proportional to 21,018.76, 29,006.04 and 11,587.48

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Solution

The fourth proportional to 21,018.76, 29,006.04 and 11,587.48 is: 15,990.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.76 : 29,006.04 = 11,587.48 : x
  2. Step 2: Convert to fraction form
    21,018.76/29,006.04 = 11,587.48/x
  3. Step 3: Cross multiply
    21,018.76x = 29,006.04 × 11,587.48
  4. Step 4: Simplify right side
    21,018.76x = 336,106,908.38
  5. Step 5: Solve for x
    x = 336,106,908.38/21,018.76
  6. Step 6: Final answer
    x = 15,990.81

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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.