Home / 28,136.70-38,828.79-15,561.54

Finding the Fourth Proportional to 28,136.70, 38,828.79 and 15,561.54

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Solution

The fourth proportional to 28,136.70, 38,828.79 and 15,561.54 is: 21,475.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,136.70 : 38,828.79 = 15,561.54 : x
  2. Step 2: Convert to fraction form
    28,136.70/38,828.79 = 15,561.54/x
  3. Step 3: Cross multiply
    28,136.70x = 38,828.79 × 15,561.54
  4. Step 4: Simplify right side
    28,136.70x = 604,235,768.74
  5. Step 5: Solve for x
    x = 604,235,768.74/28,136.70
  6. Step 6: Final answer
    x = 21,475.00

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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.