Home / 12,470.18-17,210.49-8,690.90

Finding the Fourth Proportional to 12,470.18, 17,210.49 and 8,690.90

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Solution

The fourth proportional to 12,470.18, 17,210.49 and 8,690.90 is: 11,994.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,470.18 : 17,210.49 = 8,690.90 : x
  2. Step 2: Convert to fraction form
    12,470.18/17,210.49 = 8,690.90/x
  3. Step 3: Cross multiply
    12,470.18x = 17,210.49 × 8,690.90
  4. Step 4: Simplify right side
    12,470.18x = 149,574,647.54
  5. Step 5: Solve for x
    x = 149,574,647.54/12,470.18
  6. Step 6: Final answer
    x = 11,994.59

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1.5x scale

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.