Home / 21,213.48-29,275.74-12,716.99

Finding the Fourth Proportional to 21,213.48, 29,275.74 and 12,716.99

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Solution

The fourth proportional to 21,213.48, 29,275.74 and 12,716.99 is: 17,550.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,213.48 : 29,275.74 = 12,716.99 : x
  2. Step 2: Convert to fraction form
    21,213.48/29,275.74 = 12,716.99/x
  3. Step 3: Cross multiply
    21,213.48x = 29,275.74 × 12,716.99
  4. Step 4: Simplify right side
    21,213.48x = 372,299,292.82
  5. Step 5: Solve for x
    x = 372,299,292.82/21,213.48
  6. Step 6: Final answer
    x = 17,550.13

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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.