Home / 28,126.48-38,815.32-15,551.68

Finding the Fourth Proportional to 28,126.48, 38,815.32 and 15,551.68

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Solution

The fourth proportional to 28,126.48, 38,815.32 and 15,551.68 is: 21,461.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,126.48 : 38,815.32 = 15,551.68 : x
  2. Step 2: Convert to fraction form
    28,126.48/38,815.32 = 15,551.68/x
  3. Step 3: Cross multiply
    28,126.48x = 38,815.32 × 15,551.68
  4. Step 4: Simplify right side
    28,126.48x = 603,643,435.74
  5. Step 5: Solve for x
    x = 603,643,435.74/28,126.48
  6. Step 6: Final answer
    x = 21,461.75

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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.