Home / 15,129.24-20,880.54-9,079.76

Finding the Fourth Proportional to 15,129.24, 20,880.54 and 9,079.76

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Solution

The fourth proportional to 15,129.24, 20,880.54 and 9,079.76 is: 12,531.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,129.24 : 20,880.54 = 9,079.76 : x
  2. Step 2: Convert to fraction form
    15,129.24/20,880.54 = 9,079.76/x
  3. Step 3: Cross multiply
    15,129.24x = 20,880.54 × 9,079.76
  4. Step 4: Simplify right side
    15,129.24x = 189,590,291.87
  5. Step 5: Solve for x
    x = 189,590,291.87/15,129.24
  6. Step 6: Final answer
    x = 12,531.38

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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.