Home / 21,106.28-31,590.74-15,557.40

Finding the Fourth Proportional to 21,106.28, 31,590.74 and 15,557.40

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Solution

The fourth proportional to 21,106.28, 31,590.74 and 15,557.40 is: 23,285.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,106.28 : 31,590.74 = 15,557.40 : x
  2. Step 2: Convert to fraction form
    21,106.28/31,590.74 = 15,557.40/x
  3. Step 3: Cross multiply
    21,106.28x = 31,590.74 × 15,557.40
  4. Step 4: Simplify right side
    21,106.28x = 491,469,778.48
  5. Step 5: Solve for x
    x = 491,469,778.48/21,106.28
  6. Step 6: Final answer
    x = 23,285.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.