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Finding the Fourth Proportional to 15,275.86, 21,081.50 and 8,563.64

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Solution

The fourth proportional to 15,275.86, 21,081.50 and 8,563.64 is: 11,818.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,275.86 : 21,081.50 = 8,563.64 : x
  2. Step 2: Convert to fraction form
    15,275.86/21,081.50 = 8,563.64/x
  3. Step 3: Cross multiply
    15,275.86x = 21,081.50 × 8,563.64
  4. Step 4: Simplify right side
    15,275.86x = 180,534,376.66
  5. Step 5: Solve for x
    x = 180,534,376.66/15,275.86
  6. Step 6: Final answer
    x = 11,818.28

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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.