Home / 21,881-30,210.28-16,836.32

Finding the Fourth Proportional to 21,881, 30,210.28 and 16,836.32

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Solution

The fourth proportional to 21,881, 30,210.28 and 16,836.32 is: 23,245.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,881 : 30,210.28 = 16,836.32 : x
  2. Step 2: Convert to fraction form
    21,881/30,210.28 = 16,836.32/x
  3. Step 3: Cross multiply
    21,881x = 30,210.28 × 16,836.32
  4. Step 4: Simplify right side
    21,881x = 508,629,941.37
  5. Step 5: Solve for x
    x = 508,629,941.37/21,881
  6. Step 6: Final answer
    x = 23,245.28

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Double scale
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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.