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Finding the Fourth Proportional to 15,072.60, 20,798.78 and 8,357.90

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Solution

The fourth proportional to 15,072.60, 20,798.78 and 8,357.90 is: 11,533.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,072.60 : 20,798.78 = 8,357.90 : x
  2. Step 2: Convert to fraction form
    15,072.60/20,798.78 = 8,357.90/x
  3. Step 3: Cross multiply
    15,072.60x = 20,798.78 × 8,357.90
  4. Step 4: Simplify right side
    15,072.60x = 173,834,123.36
  5. Step 5: Solve for x
    x = 173,834,123.36/15,072.60
  6. Step 6: Final answer
    x = 11,533.12

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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.