Home / 12,889.18-19,330.75-7,269.28

Finding the Fourth Proportional to 12,889.18, 19,330.75 and 7,269.28

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Solution

The fourth proportional to 12,889.18, 19,330.75 and 7,269.28 is: 10,902.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,889.18 : 19,330.75 = 7,269.28 : x
  2. Step 2: Convert to fraction form
    12,889.18/19,330.75 = 7,269.28/x
  3. Step 3: Cross multiply
    12,889.18x = 19,330.75 × 7,269.28
  4. Step 4: Simplify right side
    12,889.18x = 140,520,598.01
  5. Step 5: Solve for x
    x = 140,520,598.01/12,889.18
  6. Step 6: Final answer
    x = 10,902.21

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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.