Home / 13,890.78-19,168.92-7,602.75

Finding the Fourth Proportional to 13,890.78, 19,168.92 and 7,602.75

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Solution

The fourth proportional to 13,890.78, 19,168.92 and 7,602.75 is: 10,491.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.78 : 19,168.92 = 7,602.75 : x
  2. Step 2: Convert to fraction form
    13,890.78/19,168.92 = 7,602.75/x
  3. Step 3: Cross multiply
    13,890.78x = 19,168.92 × 7,602.75
  4. Step 4: Simplify right side
    13,890.78x = 145,736,506.53
  5. Step 5: Solve for x
    x = 145,736,506.53/13,890.78
  6. Step 6: Final answer
    x = 10,491.60

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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.