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Finding the Fourth Proportional to 28,509.60, 42,764.40 and 27,780.60

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Solution

The fourth proportional to 28,509.60, 42,764.40 and 27,780.60 is: 41,670.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,509.60 : 42,764.40 = 27,780.60 : x
  2. Step 2: Convert to fraction form
    28,509.60/42,764.40 = 27,780.60/x
  3. Step 3: Cross multiply
    28,509.60x = 42,764.40 × 27,780.60
  4. Step 4: Simplify right side
    28,509.60x = 1,188,020,690.64
  5. Step 5: Solve for x
    x = 1,188,020,690.64/28,509.60
  6. Step 6: Final answer
    x = 41,670.90

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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.