Home / 28,072.64-38,724-18,136.64

Finding the Fourth Proportional to 28,072.64, 38,724 and 18,136.64

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Solution

The fourth proportional to 28,072.64, 38,724 and 18,136.64 is: 25,018.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,072.64 : 38,724 = 18,136.64 : x
  2. Step 2: Convert to fraction form
    28,072.64/38,724 = 18,136.64/x
  3. Step 3: Cross multiply
    28,072.64x = 38,724 × 18,136.64
  4. Step 4: Simplify right side
    28,072.64x = 702,323,247.36
  5. Step 5: Solve for x
    x = 702,323,247.36/28,072.64
  6. Step 6: Final answer
    x = 25,018.07

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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.