Home / 7,131.34-9,840.98-3,988.13

Finding the Fourth Proportional to 7,131.34, 9,840.98 and 3,988.13

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Solution

The fourth proportional to 7,131.34, 9,840.98 and 3,988.13 is: 5,503.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,131.34 : 9,840.98 = 3,988.13 : x
  2. Step 2: Convert to fraction form
    7,131.34/9,840.98 = 3,988.13/x
  3. Step 3: Cross multiply
    7,131.34x = 9,840.98 × 3,988.13
  4. Step 4: Simplify right side
    7,131.34x = 39,247,087.63
  5. Step 5: Solve for x
    x = 39,247,087.63/7,131.34
  6. Step 6: Final answer
    x = 5,503.47

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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.