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Finding the Fourth Proportional to 28,539.03, 42,810.59 and 8,815.03

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Solution

The fourth proportional to 28,539.03, 42,810.59 and 8,815.03 is: 13,223.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,539.03 : 42,810.59 = 8,815.03 : x
  2. Step 2: Convert to fraction form
    28,539.03/42,810.59 = 8,815.03/x
  3. Step 3: Cross multiply
    28,539.03x = 42,810.59 × 8,815.03
  4. Step 4: Simplify right side
    28,539.03x = 377,376,635.17
  5. Step 5: Solve for x
    x = 377,376,635.17/28,539.03
  6. Step 6: Final answer
    x = 13,223.18

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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.