Home / 21,538.49-29,722.95-11,978.46

Finding the Fourth Proportional to 21,538.49, 29,722.95 and 11,978.46

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Solution

The fourth proportional to 21,538.49, 29,722.95 and 11,978.46 is: 16,530.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,538.49 : 29,722.95 = 11,978.46 : x
  2. Step 2: Convert to fraction form
    21,538.49/29,722.95 = 11,978.46/x
  3. Step 3: Cross multiply
    21,538.49x = 29,722.95 × 11,978.46
  4. Step 4: Simplify right side
    21,538.49x = 356,035,167.66
  5. Step 5: Solve for x
    x = 356,035,167.66/21,538.49
  6. Step 6: Final answer
    x = 16,530.19

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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.