Home / 13,015.80-19,523.70-9,905.40

Finding the Fourth Proportional to 13,015.80, 19,523.70 and 9,905.40

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Solution

The fourth proportional to 13,015.80, 19,523.70 and 9,905.40 is: 14,858.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,015.80 : 19,523.70 = 9,905.40 : x
  2. Step 2: Convert to fraction form
    13,015.80/19,523.70 = 9,905.40/x
  3. Step 3: Cross multiply
    13,015.80x = 19,523.70 × 9,905.40
  4. Step 4: Simplify right side
    13,015.80x = 193,390,057.98
  5. Step 5: Solve for x
    x = 193,390,057.98/13,015.80
  6. Step 6: Final answer
    x = 14,858.10

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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.