Home / 28,127-38,815.71-15,551.75

Finding the Fourth Proportional to 28,127, 38,815.71 and 15,551.75

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Solution

The fourth proportional to 28,127, 38,815.71 and 15,551.75 is: 21,461.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,127 : 38,815.71 = 15,551.75 : x
  2. Step 2: Convert to fraction form
    28,127/38,815.71 = 15,551.75/x
  3. Step 3: Cross multiply
    28,127x = 38,815.71 × 15,551.75
  4. Step 4: Simplify right side
    28,127x = 603,652,217.99
  5. Step 5: Solve for x
    x = 603,652,217.99/28,127
  6. Step 6: Final answer
    x = 21,461.66

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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.