Home / 21,018.15-29,004.80-11,586.51

Finding the Fourth Proportional to 21,018.15, 29,004.80 and 11,586.51

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Solution

The fourth proportional to 21,018.15, 29,004.80 and 11,586.51 is: 15,989.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.15 : 29,004.80 = 11,586.51 : x
  2. Step 2: Convert to fraction form
    21,018.15/29,004.80 = 11,586.51/x
  3. Step 3: Cross multiply
    21,018.15x = 29,004.80 × 11,586.51
  4. Step 4: Simplify right side
    21,018.15x = 336,064,347.32
  5. Step 5: Solve for x
    x = 336,064,347.32/21,018.15
  6. Step 6: Final answer
    x = 15,989.24

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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.