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Finding the Fourth Proportional to 15,082.16, 20,821.80 and 10,053.20

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Solution

The fourth proportional to 15,082.16, 20,821.80 and 10,053.20 is: 13,879.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,082.16 : 20,821.80 = 10,053.20 : x
  2. Step 2: Convert to fraction form
    15,082.16/20,821.80 = 10,053.20/x
  3. Step 3: Cross multiply
    15,082.16x = 20,821.80 × 10,053.20
  4. Step 4: Simplify right side
    15,082.16x = 209,325,719.76
  5. Step 5: Solve for x
    x = 209,325,719.76/15,082.16
  6. Step 6: Final answer
    x = 13,879.03

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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.