Home / 15,119.84-20,881.32-13,470.68

Finding the Fourth Proportional to 15,119.84, 20,881.32 and 13,470.68

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Solution

The fourth proportional to 15,119.84, 20,881.32 and 13,470.68 is: 18,603.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,119.84 : 20,881.32 = 13,470.68 : x
  2. Step 2: Convert to fraction form
    15,119.84/20,881.32 = 13,470.68/x
  3. Step 3: Cross multiply
    15,119.84x = 20,881.32 × 13,470.68
  4. Step 4: Simplify right side
    15,119.84x = 281,285,579.70
  5. Step 5: Solve for x
    x = 281,285,579.70/15,119.84
  6. Step 6: Final answer
    x = 18,603.74

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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.