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Finding the Fourth Proportional to 28,019.53, 42,035.45 and 8,299.63

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Solution

The fourth proportional to 28,019.53, 42,035.45 and 8,299.63 is: 12,451.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,019.53 : 42,035.45 = 8,299.63 : x
  2. Step 2: Convert to fraction form
    28,019.53/42,035.45 = 8,299.63/x
  3. Step 3: Cross multiply
    28,019.53x = 42,035.45 × 8,299.63
  4. Step 4: Simplify right side
    28,019.53x = 348,878,430.21
  5. Step 5: Solve for x
    x = 348,878,430.21/28,019.53
  6. Step 6: Final answer
    x = 12,451.26

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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.