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Finding the Fourth Proportional to 28,559.90, 42,835.80 and 8,840.45

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Solution

The fourth proportional to 28,559.90, 42,835.80 and 8,840.45 is: 13,259.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,559.90 : 42,835.80 = 8,840.45 : x
  2. Step 2: Convert to fraction form
    28,559.90/42,835.80 = 8,840.45/x
  3. Step 3: Cross multiply
    28,559.90x = 42,835.80 × 8,840.45
  4. Step 4: Simplify right side
    28,559.90x = 378,687,748.11
  5. Step 5: Solve for x
    x = 378,687,748.11/28,559.90
  6. Step 6: Final answer
    x = 13,259.42

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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.