Home / 21,252.81-29,329.03-13,299.55

Finding the Fourth Proportional to 21,252.81, 29,329.03 and 13,299.55

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Solution

The fourth proportional to 21,252.81, 29,329.03 and 13,299.55 is: 18,353.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,252.81 : 29,329.03 = 13,299.55 : x
  2. Step 2: Convert to fraction form
    21,252.81/29,329.03 = 13,299.55/x
  3. Step 3: Cross multiply
    21,252.81x = 29,329.03 × 13,299.55
  4. Step 4: Simplify right side
    21,252.81x = 390,062,900.94
  5. Step 5: Solve for x
    x = 390,062,900.94/21,252.81
  6. Step 6: Final answer
    x = 18,353.47

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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.