Home / 15,239.76-20,984.12-13,340.72

Finding the Fourth Proportional to 15,239.76, 20,984.12 and 13,340.72

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Solution

The fourth proportional to 15,239.76, 20,984.12 and 13,340.72 is: 18,369.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,239.76 : 20,984.12 = 13,340.72 : x
  2. Step 2: Convert to fraction form
    15,239.76/20,984.12 = 13,340.72/x
  3. Step 3: Cross multiply
    15,239.76x = 20,984.12 × 13,340.72
  4. Step 4: Simplify right side
    15,239.76x = 279,943,097.74
  5. Step 5: Solve for x
    x = 279,943,097.74/15,239.76
  6. Step 6: Final answer
    x = 18,369.26

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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.