Home / 15,187.30-20,955.31-11,160.45

Finding the Fourth Proportional to 15,187.30, 20,955.31 and 11,160.45

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Solution

The fourth proportional to 15,187.30, 20,955.31 and 11,160.45 is: 15,399.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,187.30 : 20,955.31 = 11,160.45 : x
  2. Step 2: Convert to fraction form
    15,187.30/20,955.31 = 11,160.45/x
  3. Step 3: Cross multiply
    15,187.30x = 20,955.31 × 11,160.45
  4. Step 4: Simplify right side
    15,187.30x = 233,870,661.59
  5. Step 5: Solve for x
    x = 233,870,661.59/15,187.30
  6. Step 6: Final answer
    x = 15,399.10

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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.