Home / 28,136.57-38,828.32-15,561.32

Finding the Fourth Proportional to 28,136.57, 38,828.32 and 15,561.32

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Solution

The fourth proportional to 28,136.57, 38,828.32 and 15,561.32 is: 21,474.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,136.57 : 38,828.32 = 15,561.32 : x
  2. Step 2: Convert to fraction form
    28,136.57/38,828.32 = 15,561.32/x
  3. Step 3: Cross multiply
    28,136.57x = 38,828.32 × 15,561.32
  4. Step 4: Simplify right side
    28,136.57x = 604,219,679.54
  5. Step 5: Solve for x
    x = 604,219,679.54/28,136.57
  6. Step 6: Final answer
    x = 21,474.54

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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.