Home / 15,419.74-21,278.21-8,705.65

Finding the Fourth Proportional to 15,419.74, 21,278.21 and 8,705.65

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Solution

The fourth proportional to 15,419.74, 21,278.21 and 8,705.65 is: 12,013.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,419.74 : 21,278.21 = 8,705.65 : x
  2. Step 2: Convert to fraction form
    15,419.74/21,278.21 = 8,705.65/x
  3. Step 3: Cross multiply
    15,419.74x = 21,278.21 × 8,705.65
  4. Step 4: Simplify right side
    15,419.74x = 185,240,605.36
  5. Step 5: Solve for x
    x = 185,240,605.36/15,419.74
  6. Step 6: Final answer
    x = 12,013.21

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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.