Home / 9,885.74-13,647.30-7,642.55

Finding the Fourth Proportional to 9,885.74, 13,647.30 and 7,642.55

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Solution

The fourth proportional to 9,885.74, 13,647.30 and 7,642.55 is: 10,550.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,885.74 : 13,647.30 = 7,642.55 : x
  2. Step 2: Convert to fraction form
    9,885.74/13,647.30 = 7,642.55/x
  3. Step 3: Cross multiply
    9,885.74x = 13,647.30 × 7,642.55
  4. Step 4: Simplify right side
    9,885.74x = 104,300,172.62
  5. Step 5: Solve for x
    x = 104,300,172.62/9,885.74
  6. Step 6: Final answer
    x = 10,550.57

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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.