Home / 21,187.68-29,238.48-11,756.40

Finding the Fourth Proportional to 21,187.68, 29,238.48 and 11,756.40

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Solution

The fourth proportional to 21,187.68, 29,238.48 and 11,756.40 is: 16,223.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.68 : 29,238.48 = 11,756.40 : x
  2. Step 2: Convert to fraction form
    21,187.68/29,238.48 = 11,756.40/x
  3. Step 3: Cross multiply
    21,187.68x = 29,238.48 × 11,756.40
  4. Step 4: Simplify right side
    21,187.68x = 343,739,266.27
  5. Step 5: Solve for x
    x = 343,739,266.27/21,187.68
  6. Step 6: Final answer
    x = 16,223.54

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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.