Home / 15,240.45-21,020.19-13,119.47

Finding the Fourth Proportional to 15,240.45, 21,020.19 and 13,119.47

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Solution

The fourth proportional to 15,240.45, 21,020.19 and 13,119.47 is: 18,094.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,240.45 : 21,020.19 = 13,119.47 : x
  2. Step 2: Convert to fraction form
    15,240.45/21,020.19 = 13,119.47/x
  3. Step 3: Cross multiply
    15,240.45x = 21,020.19 × 13,119.47
  4. Step 4: Simplify right side
    15,240.45x = 275,773,647.00
  5. Step 5: Solve for x
    x = 275,773,647.00/15,240.45
  6. Step 6: Final answer
    x = 18,094.85

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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.