Home / 12,689.62-19,039.88-5,295.74

Finding the Fourth Proportional to 12,689.62, 19,039.88 and 5,295.74

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Solution

The fourth proportional to 12,689.62, 19,039.88 and 5,295.74 is: 7,945.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,689.62 : 19,039.88 = 5,295.74 : x
  2. Step 2: Convert to fraction form
    12,689.62/19,039.88 = 5,295.74/x
  3. Step 3: Cross multiply
    12,689.62x = 19,039.88 × 5,295.74
  4. Step 4: Simplify right side
    12,689.62x = 100,830,254.11
  5. Step 5: Solve for x
    x = 100,830,254.11/12,689.62
  6. Step 6: Final answer
    x = 7,945.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.