Home / 20,568.32-28,384.08-11,136.72

Finding the Fourth Proportional to 20,568.32, 28,384.08 and 11,136.72

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Solution

The fourth proportional to 20,568.32, 28,384.08 and 11,136.72 is: 15,368.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,568.32 : 28,384.08 = 11,136.72 : x
  2. Step 2: Convert to fraction form
    20,568.32/28,384.08 = 11,136.72/x
  3. Step 3: Cross multiply
    20,568.32x = 28,384.08 × 11,136.72
  4. Step 4: Simplify right side
    20,568.32x = 316,105,551.42
  5. Step 5: Solve for x
    x = 316,105,551.42/20,568.32
  6. Step 6: Final answer
    x = 15,368.56

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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.