Home / 21,011.32-28,996.23-11,580.49

Finding the Fourth Proportional to 21,011.32, 28,996.23 and 11,580.49

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Solution

The fourth proportional to 21,011.32, 28,996.23 and 11,580.49 is: 15,981.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.32 : 28,996.23 = 11,580.49 : x
  2. Step 2: Convert to fraction form
    21,011.32/28,996.23 = 11,580.49/x
  3. Step 3: Cross multiply
    21,011.32x = 28,996.23 × 11,580.49
  4. Step 4: Simplify right side
    21,011.32x = 335,790,551.55
  5. Step 5: Solve for x
    x = 335,790,551.55/21,011.32
  6. Step 6: Final answer
    x = 15,981.41

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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.