Home / 21,615.33-29,809.75-18,440.08

Finding the Fourth Proportional to 21,615.33, 29,809.75 and 18,440.08

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Solution

The fourth proportional to 21,615.33, 29,809.75 and 18,440.08 is: 25,430.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,615.33 : 29,809.75 = 18,440.08 : x
  2. Step 2: Convert to fraction form
    21,615.33/29,809.75 = 18,440.08/x
  3. Step 3: Cross multiply
    21,615.33x = 29,809.75 × 18,440.08
  4. Step 4: Simplify right side
    21,615.33x = 549,694,174.78
  5. Step 5: Solve for x
    x = 549,694,174.78/21,615.33
  6. Step 6: Final answer
    x = 25,430.76

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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.