Home / 21,666.40-29,869.98-13,704.64

Finding the Fourth Proportional to 21,666.40, 29,869.98 and 13,704.64

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Solution

The fourth proportional to 21,666.40, 29,869.98 and 13,704.64 is: 18,893.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,666.40 : 29,869.98 = 13,704.64 : x
  2. Step 2: Convert to fraction form
    21,666.40/29,869.98 = 13,704.64/x
  3. Step 3: Cross multiply
    21,666.40x = 29,869.98 × 13,704.64
  4. Step 4: Simplify right side
    21,666.40x = 409,357,322.71
  5. Step 5: Solve for x
    x = 409,357,322.71/21,666.40
  6. Step 6: Final answer
    x = 18,893.65

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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.