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Finding the Fourth Proportional to 28,030.68, 42,051 and 9,311.84

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Solution

The fourth proportional to 28,030.68, 42,051 and 9,311.84 is: 13,969.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,030.68 : 42,051 = 9,311.84 : x
  2. Step 2: Convert to fraction form
    28,030.68/42,051 = 9,311.84/x
  3. Step 3: Cross multiply
    28,030.68x = 42,051 × 9,311.84
  4. Step 4: Simplify right side
    28,030.68x = 391,572,183.84
  5. Step 5: Solve for x
    x = 391,572,183.84/28,030.68
  6. Step 6: Final answer
    x = 13,969.41

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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.