Home / 21,615.36-29,829.16-11,679.36

Finding the Fourth Proportional to 21,615.36, 29,829.16 and 11,679.36

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Solution

The fourth proportional to 21,615.36, 29,829.16 and 11,679.36 is: 16,117.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,615.36 : 29,829.16 = 11,679.36 : x
  2. Step 2: Convert to fraction form
    21,615.36/29,829.16 = 11,679.36/x
  3. Step 3: Cross multiply
    21,615.36x = 29,829.16 × 11,679.36
  4. Step 4: Simplify right side
    21,615.36x = 348,385,498.14
  5. Step 5: Solve for x
    x = 348,385,498.14/21,615.36
  6. Step 6: Final answer
    x = 16,117.50

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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.