Home / 15,518.92-21,416.10-8,445.64

Finding the Fourth Proportional to 15,518.92, 21,416.10 and 8,445.64

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Solution

The fourth proportional to 15,518.92, 21,416.10 and 8,445.64 is: 11,654.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,518.92 : 21,416.10 = 8,445.64 : x
  2. Step 2: Convert to fraction form
    15,518.92/21,416.10 = 8,445.64/x
  3. Step 3: Cross multiply
    15,518.92x = 21,416.10 × 8,445.64
  4. Step 4: Simplify right side
    15,518.92x = 180,872,670.80
  5. Step 5: Solve for x
    x = 180,872,670.80/15,518.92
  6. Step 6: Final answer
    x = 11,654.98

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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.