Home / 21,415.77-29,554.16-11,984.31

Finding the Fourth Proportional to 21,415.77, 29,554.16 and 11,984.31

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Solution

The fourth proportional to 21,415.77, 29,554.16 and 11,984.31 is: 16,538.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,415.77 : 29,554.16 = 11,984.31 : x
  2. Step 2: Convert to fraction form
    21,415.77/29,554.16 = 11,984.31/x
  3. Step 3: Cross multiply
    21,415.77x = 29,554.16 × 11,984.31
  4. Step 4: Simplify right side
    21,415.77x = 354,186,155.31
  5. Step 5: Solve for x
    x = 354,186,155.31/21,415.77
  6. Step 6: Final answer
    x = 16,538.57

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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.