Home / 11,128.55-15,350.04-7,143.35

Finding the Fourth Proportional to 11,128.55, 15,350.04 and 7,143.35

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Solution

The fourth proportional to 11,128.55, 15,350.04 and 7,143.35 is: 9,853.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,128.55 : 15,350.04 = 7,143.35 : x
  2. Step 2: Convert to fraction form
    11,128.55/15,350.04 = 7,143.35/x
  3. Step 3: Cross multiply
    11,128.55x = 15,350.04 × 7,143.35
  4. Step 4: Simplify right side
    11,128.55x = 109,650,631.48
  5. Step 5: Solve for x
    x = 109,650,631.48/11,128.55
  6. Step 6: Final answer
    x = 9,853.10

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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.