Home / 21,802.17-30,078.03-15,820.59

Finding the Fourth Proportional to 21,802.17, 30,078.03 and 15,820.59

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Solution

The fourth proportional to 21,802.17, 30,078.03 and 15,820.59 is: 21,825.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,802.17 : 30,078.03 = 15,820.59 : x
  2. Step 2: Convert to fraction form
    21,802.17/30,078.03 = 15,820.59/x
  3. Step 3: Cross multiply
    21,802.17x = 30,078.03 × 15,820.59
  4. Step 4: Simplify right side
    21,802.17x = 475,852,180.64
  5. Step 5: Solve for x
    x = 475,852,180.64/21,802.17
  6. Step 6: Final answer
    x = 21,825.91

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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.