Home / 10,952.55-15,121.80-8,430.21

Finding the Fourth Proportional to 10,952.55, 15,121.80 and 8,430.21

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Solution

The fourth proportional to 10,952.55, 15,121.80 and 8,430.21 is: 11,639.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,952.55 : 15,121.80 = 8,430.21 : x
  2. Step 2: Convert to fraction form
    10,952.55/15,121.80 = 8,430.21/x
  3. Step 3: Cross multiply
    10,952.55x = 15,121.80 × 8,430.21
  4. Step 4: Simplify right side
    10,952.55x = 127,479,949.58
  5. Step 5: Solve for x
    x = 127,479,949.58/10,952.55
  6. Step 6: Final answer
    x = 11,639.29

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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.