Home / 8,210.40-12,290.15-6,637.28

Finding the Fourth Proportional to 8,210.40, 12,290.15 and 6,637.28

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Solution

The fourth proportional to 8,210.40, 12,290.15 and 6,637.28 is: 9,935.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,210.40 : 12,290.15 = 6,637.28 : x
  2. Step 2: Convert to fraction form
    8,210.40/12,290.15 = 6,637.28/x
  3. Step 3: Cross multiply
    8,210.40x = 12,290.15 × 6,637.28
  4. Step 4: Simplify right side
    8,210.40x = 81,573,072.15
  5. Step 5: Solve for x
    x = 81,573,072.15/8,210.40
  6. Step 6: Final answer
    x = 9,935.33

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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.