Home / 20,471.23-28,248.28-11,518.54

Finding the Fourth Proportional to 20,471.23, 28,248.28 and 11,518.54

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Solution

The fourth proportional to 20,471.23, 28,248.28 and 11,518.54 is: 15,894.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,471.23 : 28,248.28 = 11,518.54 : x
  2. Step 2: Convert to fraction form
    20,471.23/28,248.28 = 11,518.54/x
  3. Step 3: Cross multiply
    20,471.23x = 28,248.28 × 11,518.54
  4. Step 4: Simplify right side
    20,471.23x = 325,378,943.11
  5. Step 5: Solve for x
    x = 325,378,943.11/20,471.23
  6. Step 6: Final answer
    x = 15,894.45

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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.