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Finding the Fourth Proportional to 28,519.02, 42,781.04 and 7,458.99

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Solution

The fourth proportional to 28,519.02, 42,781.04 and 7,458.99 is: 11,189.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,519.02 : 42,781.04 = 7,458.99 : x
  2. Step 2: Convert to fraction form
    28,519.02/42,781.04 = 7,458.99/x
  3. Step 3: Cross multiply
    28,519.02x = 42,781.04 × 7,458.99
  4. Step 4: Simplify right side
    28,519.02x = 319,103,349.55
  5. Step 5: Solve for x
    x = 319,103,349.55/28,519.02
  6. Step 6: Final answer
    x = 11,189.14

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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.