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Finding the Fourth Proportional to 28,779.28, 43,173.18 and 9,051.28

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Solution

The fourth proportional to 28,779.28, 43,173.18 and 9,051.28 is: 13,578.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,779.28 : 43,173.18 = 9,051.28 : x
  2. Step 2: Convert to fraction form
    28,779.28/43,173.18 = 9,051.28/x
  3. Step 3: Cross multiply
    28,779.28x = 43,173.18 × 9,051.28
  4. Step 4: Simplify right side
    28,779.28x = 390,772,540.67
  5. Step 5: Solve for x
    x = 390,772,540.67/28,779.28
  6. Step 6: Final answer
    x = 13,578.26

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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.