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Finding the Fourth Proportional to 15,807.80, 21,814.60 and 8,733.76

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Solution

The fourth proportional to 15,807.80, 21,814.60 and 8,733.76 is: 12,052.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,807.80 : 21,814.60 = 8,733.76 : x
  2. Step 2: Convert to fraction form
    15,807.80/21,814.60 = 8,733.76/x
  3. Step 3: Cross multiply
    15,807.80x = 21,814.60 × 8,733.76
  4. Step 4: Simplify right side
    15,807.80x = 190,523,480.90
  5. Step 5: Solve for x
    x = 190,523,480.90/15,807.80
  6. Step 6: Final answer
    x = 12,052.50

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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.