Home / 21,615.93-29,825.44-13,122.50

Finding the Fourth Proportional to 21,615.93, 29,825.44 and 13,122.50

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Solution

The fourth proportional to 21,615.93, 29,825.44 and 13,122.50 is: 18,106.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,615.93 : 29,825.44 = 13,122.50 : x
  2. Step 2: Convert to fraction form
    21,615.93/29,825.44 = 13,122.50/x
  3. Step 3: Cross multiply
    21,615.93x = 29,825.44 × 13,122.50
  4. Step 4: Simplify right side
    21,615.93x = 391,384,154.47
  5. Step 5: Solve for x
    x = 391,384,154.47/21,615.93
  6. Step 6: Final answer
    x = 18,106.28

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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.