Home / 22,131.16-30,531.86-15,420.68

Finding the Fourth Proportional to 22,131.16, 30,531.86 and 15,420.68

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Solution

The fourth proportional to 22,131.16, 30,531.86 and 15,420.68 is: 21,274.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,131.16 : 30,531.86 = 15,420.68 : x
  2. Step 2: Convert to fraction form
    22,131.16/30,531.86 = 15,420.68/x
  3. Step 3: Cross multiply
    22,131.16x = 30,531.86 × 15,420.68
  4. Step 4: Simplify right side
    22,131.16x = 470,822,042.86
  5. Step 5: Solve for x
    x = 470,822,042.86/22,131.16
  6. Step 6: Final answer
    x = 21,274.17

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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.