Home / 13,079.28-18,049.80-7,111.20

Finding the Fourth Proportional to 13,079.28, 18,049.80 and 7,111.20

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Solution

The fourth proportional to 13,079.28, 18,049.80 and 7,111.20 is: 9,813.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,079.28 : 18,049.80 = 7,111.20 : x
  2. Step 2: Convert to fraction form
    13,079.28/18,049.80 = 7,111.20/x
  3. Step 3: Cross multiply
    13,079.28x = 18,049.80 × 7,111.20
  4. Step 4: Simplify right side
    13,079.28x = 128,355,737.76
  5. Step 5: Solve for x
    x = 128,355,737.76/13,079.28
  6. Step 6: Final answer
    x = 9,813.67

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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.