Home / 13,136.80-19,679.60-7,927.20

Finding the Fourth Proportional to 13,136.80, 19,679.60 and 7,927.20

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Solution

The fourth proportional to 13,136.80, 19,679.60 and 7,927.20 is: 11,875.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.80 : 19,679.60 = 7,927.20 : x
  2. Step 2: Convert to fraction form
    13,136.80/19,679.60 = 7,927.20/x
  3. Step 3: Cross multiply
    13,136.80x = 19,679.60 × 7,927.20
  4. Step 4: Simplify right side
    13,136.80x = 156,004,125.12
  5. Step 5: Solve for x
    x = 156,004,125.12/13,136.80
  6. Step 6: Final answer
    x = 11,875.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.