Home / 21,087.71-29,101.07-12,135.03

Finding the Fourth Proportional to 21,087.71, 29,101.07 and 12,135.03

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Solution

The fourth proportional to 21,087.71, 29,101.07 and 12,135.03 is: 16,746.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.71 : 29,101.07 = 12,135.03 : x
  2. Step 2: Convert to fraction form
    21,087.71/29,101.07 = 12,135.03/x
  3. Step 3: Cross multiply
    21,087.71x = 29,101.07 × 12,135.03
  4. Step 4: Simplify right side
    21,087.71x = 353,142,296.81
  5. Step 5: Solve for x
    x = 353,142,296.81/21,087.71
  6. Step 6: Final answer
    x = 16,746.36

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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.