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Finding the Fourth Proportional to 10,903.55, 15,031.78 and 7,361.15

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Solution

The fourth proportional to 10,903.55, 15,031.78 and 7,361.15 is: 10,148.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,903.55 : 15,031.78 = 7,361.15 : x
  2. Step 2: Convert to fraction form
    10,903.55/15,031.78 = 7,361.15/x
  3. Step 3: Cross multiply
    10,903.55x = 15,031.78 × 7,361.15
  4. Step 4: Simplify right side
    10,903.55x = 110,651,140.57
  5. Step 5: Solve for x
    x = 110,651,140.57/10,903.55
  6. Step 6: Final answer
    x = 10,148.18

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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.