Home / 20,387.66-28,134.33-12,426.98

Finding the Fourth Proportional to 20,387.66, 28,134.33 and 12,426.98

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Solution

The fourth proportional to 20,387.66, 28,134.33 and 12,426.98 is: 17,148.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,387.66 : 28,134.33 = 12,426.98 : x
  2. Step 2: Convert to fraction form
    20,387.66/28,134.33 = 12,426.98/x
  3. Step 3: Cross multiply
    20,387.66x = 28,134.33 × 12,426.98
  4. Step 4: Simplify right side
    20,387.66x = 349,624,756.22
  5. Step 5: Solve for x
    x = 349,624,756.22/20,387.66
  6. Step 6: Final answer
    x = 17,148.84

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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.