Home / 15,140.88-20,888.61-11,171.46

Finding the Fourth Proportional to 15,140.88, 20,888.61 and 11,171.46

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Solution

The fourth proportional to 15,140.88, 20,888.61 and 11,171.46 is: 15,412.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,140.88 : 20,888.61 = 11,171.46 : x
  2. Step 2: Convert to fraction form
    15,140.88/20,888.61 = 11,171.46/x
  3. Step 3: Cross multiply
    15,140.88x = 20,888.61 × 11,171.46
  4. Step 4: Simplify right side
    15,140.88x = 233,356,271.07
  5. Step 5: Solve for x
    x = 233,356,271.07/15,140.88
  6. Step 6: Final answer
    x = 15,412.33

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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.