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Finding the Fourth Proportional to 15,648.10, 21,594.48 and 8,574.78

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Solution

The fourth proportional to 15,648.10, 21,594.48 and 8,574.78 is: 11,833.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,648.10 : 21,594.48 = 8,574.78 : x
  2. Step 2: Convert to fraction form
    15,648.10/21,594.48 = 8,574.78/x
  3. Step 3: Cross multiply
    15,648.10x = 21,594.48 × 8,574.78
  4. Step 4: Simplify right side
    15,648.10x = 185,167,915.21
  5. Step 5: Solve for x
    x = 185,167,915.21/15,648.10
  6. Step 6: Final answer
    x = 11,833.25

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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.