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Finding the Fourth Proportional to 15,684.64, 21,646.80 and 9,060.64

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Solution

The fourth proportional to 15,684.64, 21,646.80 and 9,060.64 is: 12,504.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,684.64 : 21,646.80 = 9,060.64 : x
  2. Step 2: Convert to fraction form
    15,684.64/21,646.80 = 9,060.64/x
  3. Step 3: Cross multiply
    15,684.64x = 21,646.80 × 9,060.64
  4. Step 4: Simplify right side
    15,684.64x = 196,133,861.95
  5. Step 5: Solve for x
    x = 196,133,861.95/15,684.64
  6. Step 6: Final answer
    x = 12,504.84

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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.