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Finding the Fourth Proportional to 15,077.76, 20,795.76 and 13,378.56

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Solution

The fourth proportional to 15,077.76, 20,795.76 and 13,378.56 is: 18,452.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,077.76 : 20,795.76 = 13,378.56 : x
  2. Step 2: Convert to fraction form
    15,077.76/20,795.76 = 13,378.56/x
  3. Step 3: Cross multiply
    15,077.76x = 20,795.76 × 13,378.56
  4. Step 4: Simplify right side
    15,077.76x = 278,217,322.91
  5. Step 5: Solve for x
    x = 278,217,322.91/15,077.76
  6. Step 6: Final answer
    x = 18,452.17

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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.