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Finding the Fourth Proportional to 28,211.63, 42,320.00 and 7,435.13

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Solution

The fourth proportional to 28,211.63, 42,320.00 and 7,435.13 is: 11,153.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,211.63 : 42,320.00 = 7,435.13 : x
  2. Step 2: Convert to fraction form
    28,211.63/42,320.00 = 7,435.13/x
  3. Step 3: Cross multiply
    28,211.63x = 42,320.00 × 7,435.13
  4. Step 4: Simplify right side
    28,211.63x = 314,654,508.59
  5. Step 5: Solve for x
    x = 314,654,508.59/28,211.63
  6. Step 6: Final answer
    x = 11,153.36

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1.5x scale

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.