Home / 28,005.03-38,655.09-18,315.86

Finding the Fourth Proportional to 28,005.03, 38,655.09 and 18,315.86

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Solution

The fourth proportional to 28,005.03, 38,655.09 and 18,315.86 is: 25,281.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,005.03 : 38,655.09 = 18,315.86 : x
  2. Step 2: Convert to fraction form
    28,005.03/38,655.09 = 18,315.86/x
  3. Step 3: Cross multiply
    28,005.03x = 38,655.09 × 18,315.86
  4. Step 4: Simplify right side
    28,005.03x = 708,001,070.64
  5. Step 5: Solve for x
    x = 708,001,070.64/28,005.03
  6. Step 6: Final answer
    x = 25,281.21

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.