Home / 15,378.53-21,222.14-8,664.30

Finding the Fourth Proportional to 15,378.53, 21,222.14 and 8,664.30

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Solution

The fourth proportional to 15,378.53, 21,222.14 and 8,664.30 is: 11,956.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,378.53 : 21,222.14 = 8,664.30 : x
  2. Step 2: Convert to fraction form
    15,378.53/21,222.14 = 8,664.30/x
  3. Step 3: Cross multiply
    15,378.53x = 21,222.14 × 8,664.30
  4. Step 4: Simplify right side
    15,378.53x = 183,874,944.28
  5. Step 5: Solve for x
    x = 183,874,944.28/15,378.53
  6. Step 6: Final answer
    x = 11,956.60

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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.