Home / 8,740.12-13,097.21-6,420.28

Finding the Fourth Proportional to 8,740.12, 13,097.21 and 6,420.28

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Solution

The fourth proportional to 8,740.12, 13,097.21 and 6,420.28 is: 9,620.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,740.12 : 13,097.21 = 6,420.28 : x
  2. Step 2: Convert to fraction form
    8,740.12/13,097.21 = 6,420.28/x
  3. Step 3: Cross multiply
    8,740.12x = 13,097.21 × 6,420.28
  4. Step 4: Simplify right side
    8,740.12x = 84,087,689.93
  5. Step 5: Solve for x
    x = 84,087,689.93/8,740.12
  6. Step 6: Final answer
    x = 9,620.89

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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.