Home / 12,118.80-16,724.40-7,340.32

Finding the Fourth Proportional to 12,118.80, 16,724.40 and 7,340.32

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Solution

The fourth proportional to 12,118.80, 16,724.40 and 7,340.32 is: 10,129.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,118.80 : 16,724.40 = 7,340.32 : x
  2. Step 2: Convert to fraction form
    12,118.80/16,724.40 = 7,340.32/x
  3. Step 3: Cross multiply
    12,118.80x = 16,724.40 × 7,340.32
  4. Step 4: Simplify right side
    12,118.80x = 122,762,447.81
  5. Step 5: Solve for x
    x = 122,762,447.81/12,118.80
  6. Step 6: Final answer
    x = 10,129.92

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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.