Home / 15,427.40-21,290.46-9,138.56

Finding the Fourth Proportional to 15,427.40, 21,290.46 and 9,138.56

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Solution

The fourth proportional to 15,427.40, 21,290.46 and 9,138.56 is: 12,611.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,427.40 : 21,290.46 = 9,138.56 : x
  2. Step 2: Convert to fraction form
    15,427.40/21,290.46 = 9,138.56/x
  3. Step 3: Cross multiply
    15,427.40x = 21,290.46 × 9,138.56
  4. Step 4: Simplify right side
    15,427.40x = 194,564,146.14
  5. Step 5: Solve for x
    x = 194,564,146.14/15,427.40
  6. Step 6: Final answer
    x = 12,611.60

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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.