Home / 13,105.52-18,085.40-7,800.20

Finding the Fourth Proportional to 13,105.52, 18,085.40 and 7,800.20

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Solution

The fourth proportional to 13,105.52, 18,085.40 and 7,800.20 is: 10,764.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,105.52 : 18,085.40 = 7,800.20 : x
  2. Step 2: Convert to fraction form
    13,105.52/18,085.40 = 7,800.20/x
  3. Step 3: Cross multiply
    13,105.52x = 18,085.40 × 7,800.20
  4. Step 4: Simplify right side
    13,105.52x = 141,069,737.08
  5. Step 5: Solve for x
    x = 141,069,737.08/13,105.52
  6. Step 6: Final answer
    x = 10,764.15

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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.