Home / 21,188.51-29,237.06-13,645.05

Finding the Fourth Proportional to 21,188.51, 29,237.06 and 13,645.05

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Solution

The fourth proportional to 21,188.51, 29,237.06 and 13,645.05 is: 18,828.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,188.51 : 29,237.06 = 13,645.05 : x
  2. Step 2: Convert to fraction form
    21,188.51/29,237.06 = 13,645.05/x
  3. Step 3: Cross multiply
    21,188.51x = 29,237.06 × 13,645.05
  4. Step 4: Simplify right side
    21,188.51x = 398,941,077.33
  5. Step 5: Solve for x
    x = 398,941,077.33/21,188.51
  6. Step 6: Final answer
    x = 18,828.18

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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.