Home / 15,378.66-21,222.62-8,664.39

Finding the Fourth Proportional to 15,378.66, 21,222.62 and 8,664.39

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Solution

The fourth proportional to 15,378.66, 21,222.62 and 8,664.39 is: 11,956.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,378.66 : 21,222.62 = 8,664.39 : x
  2. Step 2: Convert to fraction form
    15,378.66/21,222.62 = 8,664.39/x
  3. Step 3: Cross multiply
    15,378.66x = 21,222.62 × 8,664.39
  4. Step 4: Simplify right side
    15,378.66x = 183,881,045.67
  5. Step 5: Solve for x
    x = 183,881,045.67/15,378.66
  6. Step 6: Final answer
    x = 11,956.90

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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.