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Finding the Fourth Proportional to 15,190, 20,963.01 and 8,904.40

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Solution

The fourth proportional to 15,190, 20,963.01 and 8,904.40 is: 12,288.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,190 : 20,963.01 = 8,904.40 : x
  2. Step 2: Convert to fraction form
    15,190/20,963.01 = 8,904.40/x
  3. Step 3: Cross multiply
    15,190x = 20,963.01 × 8,904.40
  4. Step 4: Simplify right side
    15,190x = 186,663,026.24
  5. Step 5: Solve for x
    x = 186,663,026.24/15,190
  6. Step 6: Final answer
    x = 12,288.55

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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.