Home / 28,403.28-42,603.12-8,680.02

Finding the Fourth Proportional to 28,403.28, 42,603.12 and 8,680.02

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Solution

The fourth proportional to 28,403.28, 42,603.12 and 8,680.02 is: 13,019.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,403.28 : 42,603.12 = 8,680.02 : x
  2. Step 2: Convert to fraction form
    28,403.28/42,603.12 = 8,680.02/x
  3. Step 3: Cross multiply
    28,403.28x = 42,603.12 × 8,680.02
  4. Step 4: Simplify right side
    28,403.28x = 369,795,933.66
  5. Step 5: Solve for x
    x = 369,795,933.66/28,403.28
  6. Step 6: Final answer
    x = 13,019.48

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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.