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Finding the Fourth Proportional to 28,978.64, 43,459.32 and 9,256.40

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Solution

The fourth proportional to 28,978.64, 43,459.32 and 9,256.40 is: 13,881.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978.64 : 43,459.32 = 9,256.40 : x
  2. Step 2: Convert to fraction form
    28,978.64/43,459.32 = 9,256.40/x
  3. Step 3: Cross multiply
    28,978.64x = 43,459.32 × 9,256.40
  4. Step 4: Simplify right side
    28,978.64x = 402,276,849.65
  5. Step 5: Solve for x
    x = 402,276,849.65/28,978.64
  6. Step 6: Final answer
    x = 13,881.84

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.