Home / 28,457.16-42,690.80-9,739.28

Finding the Fourth Proportional to 28,457.16, 42,690.80 and 9,739.28

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Solution

The fourth proportional to 28,457.16, 42,690.80 and 9,739.28 is: 14,610.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,457.16 : 42,690.80 = 9,739.28 : x
  2. Step 2: Convert to fraction form
    28,457.16/42,690.80 = 9,739.28/x
  3. Step 3: Cross multiply
    28,457.16x = 42,690.80 × 9,739.28
  4. Step 4: Simplify right side
    28,457.16x = 415,777,654.62
  5. Step 5: Solve for x
    x = 415,777,654.62/28,457.16
  6. Step 6: Final answer
    x = 14,610.65

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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.