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Finding the Fourth Proportional to 17,130.90, 25,700.40 and 8,812.20

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Solution

The fourth proportional to 17,130.90, 25,700.40 and 8,812.20 is: 13,220.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,130.90 : 25,700.40 = 8,812.20 : x
  2. Step 2: Convert to fraction form
    17,130.90/25,700.40 = 8,812.20/x
  3. Step 3: Cross multiply
    17,130.90x = 25,700.40 × 8,812.20
  4. Step 4: Simplify right side
    17,130.90x = 226,477,064.88
  5. Step 5: Solve for x
    x = 226,477,064.88/17,130.90
  6. Step 6: Final answer
    x = 13,220.38

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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.