Home / 28,128.87-38,816.42-15,551.19

Finding the Fourth Proportional to 28,128.87, 38,816.42 and 15,551.19

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Solution

The fourth proportional to 28,128.87, 38,816.42 and 15,551.19 is: 21,459.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,128.87 : 38,816.42 = 15,551.19 : x
  2. Step 2: Convert to fraction form
    28,128.87/38,816.42 = 15,551.19/x
  3. Step 3: Cross multiply
    28,128.87x = 38,816.42 × 15,551.19
  4. Step 4: Simplify right side
    28,128.87x = 603,641,444.78
  5. Step 5: Solve for x
    x = 603,641,444.78/28,128.87
  6. Step 6: Final answer
    x = 21,459.85

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Half scale
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Double scale
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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.