Home / 21,655.20-29,890.56-12,704.64

Finding the Fourth Proportional to 21,655.20, 29,890.56 and 12,704.64

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Solution

The fourth proportional to 21,655.20, 29,890.56 and 12,704.64 is: 17,536.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,655.20 : 29,890.56 = 12,704.64 : x
  2. Step 2: Convert to fraction form
    21,655.20/29,890.56 = 12,704.64/x
  3. Step 3: Cross multiply
    21,655.20x = 29,890.56 × 12,704.64
  4. Step 4: Simplify right side
    21,655.20x = 379,748,804.20
  5. Step 5: Solve for x
    x = 379,748,804.20/21,655.20
  6. Step 6: Final answer
    x = 17,536.15

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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.