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Finding the Fourth Proportional to 12,512.80, 17,271.04 and 7,477.20

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Solution

The fourth proportional to 12,512.80, 17,271.04 and 7,477.20 is: 10,320.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,512.80 : 17,271.04 = 7,477.20 : x
  2. Step 2: Convert to fraction form
    12,512.80/17,271.04 = 7,477.20/x
  3. Step 3: Cross multiply
    12,512.80x = 17,271.04 × 7,477.20
  4. Step 4: Simplify right side
    12,512.80x = 129,139,020.29
  5. Step 5: Solve for x
    x = 129,139,020.29/12,512.80
  6. Step 6: Final answer
    x = 10,320.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.