Home / 15,072.39-20,810.21-9,415.76

Finding the Fourth Proportional to 15,072.39, 20,810.21 and 9,415.76

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Solution

The fourth proportional to 15,072.39, 20,810.21 and 9,415.76 is: 13,000.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,072.39 : 20,810.21 = 9,415.76 : x
  2. Step 2: Convert to fraction form
    15,072.39/20,810.21 = 9,415.76/x
  3. Step 3: Cross multiply
    15,072.39x = 20,810.21 × 9,415.76
  4. Step 4: Simplify right side
    15,072.39x = 195,943,791.78
  5. Step 5: Solve for x
    x = 195,943,791.78/15,072.39
  6. Step 6: Final answer
    x = 13,000.18

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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.