Home / 12,961.44-19,438.80-5,570.40

Finding the Fourth Proportional to 12,961.44, 19,438.80 and 5,570.40

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Solution

The fourth proportional to 12,961.44, 19,438.80 and 5,570.40 is: 8,354.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,961.44 : 19,438.80 = 5,570.40 : x
  2. Step 2: Convert to fraction form
    12,961.44/19,438.80 = 5,570.40/x
  3. Step 3: Cross multiply
    12,961.44x = 19,438.80 × 5,570.40
  4. Step 4: Simplify right side
    12,961.44x = 108,281,891.52
  5. Step 5: Solve for x
    x = 108,281,891.52/12,961.44
  6. Step 6: Final answer
    x = 8,354.16

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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.