Home / 19,343.21-26,689.55-12,638.68

Finding the Fourth Proportional to 19,343.21, 26,689.55 and 12,638.68

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Solution

The fourth proportional to 19,343.21, 26,689.55 and 12,638.68 is: 17,438.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,343.21 : 26,689.55 = 12,638.68 : x
  2. Step 2: Convert to fraction form
    19,343.21/26,689.55 = 12,638.68/x
  3. Step 3: Cross multiply
    19,343.21x = 26,689.55 × 12,638.68
  4. Step 4: Simplify right side
    19,343.21x = 337,320,773.10
  5. Step 5: Solve for x
    x = 337,320,773.10/19,343.21
  6. Step 6: Final answer
    x = 17,438.72

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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.