Home / 11,931.40-16,457.58-9,409.56

Finding the Fourth Proportional to 11,931.40, 16,457.58 and 9,409.56

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Solution

The fourth proportional to 11,931.40, 16,457.58 and 9,409.56 is: 12,979.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,931.40 : 16,457.58 = 9,409.56 : x
  2. Step 2: Convert to fraction form
    11,931.40/16,457.58 = 9,409.56/x
  3. Step 3: Cross multiply
    11,931.40x = 16,457.58 × 9,409.56
  4. Step 4: Simplify right side
    11,931.40x = 154,858,586.46
  5. Step 5: Solve for x
    x = 154,858,586.46/11,931.40
  6. Step 6: Final answer
    x = 12,979.08

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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.