Home / 15,529.32-21,428.28-8,812.80

Finding the Fourth Proportional to 15,529.32, 21,428.28 and 8,812.80

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Solution

The fourth proportional to 15,529.32, 21,428.28 and 8,812.80 is: 12,160.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,529.32 : 21,428.28 = 8,812.80 : x
  2. Step 2: Convert to fraction form
    15,529.32/21,428.28 = 8,812.80/x
  3. Step 3: Cross multiply
    15,529.32x = 21,428.28 × 8,812.80
  4. Step 4: Simplify right side
    15,529.32x = 188,843,145.98
  5. Step 5: Solve for x
    x = 188,843,145.98/15,529.32
  6. Step 6: Final answer
    x = 12,160.43

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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.