Home / 12,772.20-19,142.10-9,305.40

Finding the Fourth Proportional to 12,772.20, 19,142.10 and 9,305.40

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Solution

The fourth proportional to 12,772.20, 19,142.10 and 9,305.40 is: 13,946.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,772.20 : 19,142.10 = 9,305.40 : x
  2. Step 2: Convert to fraction form
    12,772.20/19,142.10 = 9,305.40/x
  3. Step 3: Cross multiply
    12,772.20x = 19,142.10 × 9,305.40
  4. Step 4: Simplify right side
    12,772.20x = 178,124,897.34
  5. Step 5: Solve for x
    x = 178,124,897.34/12,772.20
  6. Step 6: Final answer
    x = 13,946.30

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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.