Home / 12,783.20-19,152.90-10,158.80

Finding the Fourth Proportional to 12,783.20, 19,152.90 and 10,158.80

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Solution

The fourth proportional to 12,783.20, 19,152.90 and 10,158.80 is: 15,220.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,783.20 : 19,152.90 = 10,158.80 : x
  2. Step 2: Convert to fraction form
    12,783.20/19,152.90 = 10,158.80/x
  3. Step 3: Cross multiply
    12,783.20x = 19,152.90 × 10,158.80
  4. Step 4: Simplify right side
    12,783.20x = 194,570,480.52
  5. Step 5: Solve for x
    x = 194,570,480.52/12,783.20
  6. Step 6: Final answer
    x = 15,220.80

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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.