Home / 20,978.76-28,950.69-11,547.25

Finding the Fourth Proportional to 20,978.76, 28,950.69 and 11,547.25

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Solution

The fourth proportional to 20,978.76, 28,950.69 and 11,547.25 is: 15,935.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,978.76 : 28,950.69 = 11,547.25 : x
  2. Step 2: Convert to fraction form
    20,978.76/28,950.69 = 11,547.25/x
  3. Step 3: Cross multiply
    20,978.76x = 28,950.69 × 11,547.25
  4. Step 4: Simplify right side
    20,978.76x = 334,300,855.10
  5. Step 5: Solve for x
    x = 334,300,855.10/20,978.76
  6. Step 6: Final answer
    x = 15,935.21

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Why These Related Problems?

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