Home / 15,120.24-20,867.36-9,153.40

Finding the Fourth Proportional to 15,120.24, 20,867.36 and 9,153.40

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Solution

The fourth proportional to 15,120.24, 20,867.36 and 9,153.40 is: 12,632.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,120.24 : 20,867.36 = 9,153.40 : x
  2. Step 2: Convert to fraction form
    15,120.24/20,867.36 = 9,153.40/x
  3. Step 3: Cross multiply
    15,120.24x = 20,867.36 × 9,153.40
  4. Step 4: Simplify right side
    15,120.24x = 191,007,293.02
  5. Step 5: Solve for x
    x = 191,007,293.02/15,120.24
  6. Step 6: Final answer
    x = 12,632.56

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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.