Home / 15,185.18-20,955.58-8,470.64

Finding the Fourth Proportional to 15,185.18, 20,955.58 and 8,470.64

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Solution

The fourth proportional to 15,185.18, 20,955.58 and 8,470.64 is: 11,689.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,185.18 : 20,955.58 = 8,470.64 : x
  2. Step 2: Convert to fraction form
    15,185.18/20,955.58 = 8,470.64/x
  3. Step 3: Cross multiply
    15,185.18x = 20,955.58 × 8,470.64
  4. Step 4: Simplify right side
    15,185.18x = 177,507,174.17
  5. Step 5: Solve for x
    x = 177,507,174.17/15,185.18
  6. Step 6: Final answer
    x = 11,689.50

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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.