Home / 12,783.40-19,149.57-10,155.34

Finding the Fourth Proportional to 12,783.40, 19,149.57 and 10,155.34

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Solution

The fourth proportional to 12,783.40, 19,149.57 and 10,155.34 is: 15,212.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,783.40 : 19,149.57 = 10,155.34 : x
  2. Step 2: Convert to fraction form
    12,783.40/19,149.57 = 10,155.34/x
  3. Step 3: Cross multiply
    12,783.40x = 19,149.57 × 10,155.34
  4. Step 4: Simplify right side
    12,783.40x = 194,470,394.20
  5. Step 5: Solve for x
    x = 194,470,394.20/12,783.40
  6. Step 6: Final answer
    x = 15,212.73

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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.