Home / 12,489.21-18,740.30-9,054.81

Finding the Fourth Proportional to 12,489.21, 18,740.30 and 9,054.81

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Solution

The fourth proportional to 12,489.21, 18,740.30 and 9,054.81 is: 13,586.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.21 : 18,740.30 = 9,054.81 : x
  2. Step 2: Convert to fraction form
    12,489.21/18,740.30 = 9,054.81/x
  3. Step 3: Cross multiply
    12,489.21x = 18,740.30 × 9,054.81
  4. Step 4: Simplify right side
    12,489.21x = 169,689,810.57
  5. Step 5: Solve for x
    x = 169,689,810.57/12,489.21
  6. Step 6: Final answer
    x = 13,586.91

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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.