Home / 15,820.58-21,818.25-13,127.52

Finding the Fourth Proportional to 15,820.58, 21,818.25 and 13,127.52

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Solution

The fourth proportional to 15,820.58, 21,818.25 and 13,127.52 is: 18,104.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,820.58 : 21,818.25 = 13,127.52 : x
  2. Step 2: Convert to fraction form
    15,820.58/21,818.25 = 13,127.52/x
  3. Step 3: Cross multiply
    15,820.58x = 21,818.25 × 13,127.52
  4. Step 4: Simplify right side
    15,820.58x = 286,419,513.24
  5. Step 5: Solve for x
    x = 286,419,513.24/15,820.58
  6. Step 6: Final answer
    x = 18,104.23

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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.