Home / 12,457.42-18,660.60-9,978.82

Finding the Fourth Proportional to 12,457.42, 18,660.60 and 9,978.82

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Solution

The fourth proportional to 12,457.42, 18,660.60 and 9,978.82 is: 14,947.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,457.42 : 18,660.60 = 9,978.82 : x
  2. Step 2: Convert to fraction form
    12,457.42/18,660.60 = 9,978.82/x
  3. Step 3: Cross multiply
    12,457.42x = 18,660.60 × 9,978.82
  4. Step 4: Simplify right side
    12,457.42x = 186,210,768.49
  5. Step 5: Solve for x
    x = 186,210,768.49/12,457.42
  6. Step 6: Final answer
    x = 14,947.78

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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.