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Finding the Fourth Proportional to 28,165.70, 42,248.05 and 11,303.00

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Solution

The fourth proportional to 28,165.70, 42,248.05 and 11,303.00 is: 16,954.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,165.70 : 42,248.05 = 11,303.00 : x
  2. Step 2: Convert to fraction form
    28,165.70/42,248.05 = 11,303.00/x
  3. Step 3: Cross multiply
    28,165.70x = 42,248.05 × 11,303.00
  4. Step 4: Simplify right side
    28,165.70x = 477,529,901.67
  5. Step 5: Solve for x
    x = 477,529,901.67/28,165.70
  6. Step 6: Final answer
    x = 16,954.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.