Home / 19,159.21-26,421.51-12,687.31

Finding the Fourth Proportional to 19,159.21, 26,421.51 and 12,687.31

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Solution

The fourth proportional to 19,159.21, 26,421.51 and 12,687.31 is: 17,496.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,159.21 : 26,421.51 = 12,687.31 : x
  2. Step 2: Convert to fraction form
    19,159.21/26,421.51 = 12,687.31/x
  3. Step 3: Cross multiply
    19,159.21x = 26,421.51 × 12,687.31
  4. Step 4: Simplify right side
    19,159.21x = 335,217,821.98
  5. Step 5: Solve for x
    x = 335,217,821.98/19,159.21
  6. Step 6: Final answer
    x = 17,496.43

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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.