Home / 21,160.81-29,192.52-13,605.74

Finding the Fourth Proportional to 21,160.81, 29,192.52 and 13,605.74

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Solution

The fourth proportional to 21,160.81, 29,192.52 and 13,605.74 is: 18,769.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,160.81 : 29,192.52 = 13,605.74 : x
  2. Step 2: Convert to fraction form
    21,160.81/29,192.52 = 13,605.74/x
  3. Step 3: Cross multiply
    21,160.81x = 29,192.52 × 13,605.74
  4. Step 4: Simplify right side
    21,160.81x = 397,185,623.07
  5. Step 5: Solve for x
    x = 397,185,623.07/21,160.81
  6. Step 6: Final answer
    x = 18,769.87

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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.