Home / 21,212.10-29,259.61-13,655.94

Finding the Fourth Proportional to 21,212.10, 29,259.61 and 13,655.94

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Solution

The fourth proportional to 21,212.10, 29,259.61 and 13,655.94 is: 18,836.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,212.10 : 29,259.61 = 13,655.94 : x
  2. Step 2: Convert to fraction form
    21,212.10/29,259.61 = 13,655.94/x
  3. Step 3: Cross multiply
    21,212.10x = 29,259.61 × 13,655.94
  4. Step 4: Simplify right side
    21,212.10x = 399,567,478.58
  5. Step 5: Solve for x
    x = 399,567,478.58/21,212.10
  6. Step 6: Final answer
    x = 18,836.77

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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.