Home / 21,412.77-29,548.80-11,981.34

Finding the Fourth Proportional to 21,412.77, 29,548.80 and 11,981.34

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Solution

The fourth proportional to 21,412.77, 29,548.80 and 11,981.34 is: 16,533.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,412.77 : 29,548.80 = 11,981.34 : x
  2. Step 2: Convert to fraction form
    21,412.77/29,548.80 = 11,981.34/x
  3. Step 3: Cross multiply
    21,412.77x = 29,548.80 × 11,981.34
  4. Step 4: Simplify right side
    21,412.77x = 354,034,219.39
  5. Step 5: Solve for x
    x = 354,034,219.39/21,412.77
  6. Step 6: Final answer
    x = 16,533.79

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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.