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Finding the Fourth Proportional to 15,014.76, 20,721.44 and 8,300.24

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Solution

The fourth proportional to 15,014.76, 20,721.44 and 8,300.24 is: 11,454.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,014.76 : 20,721.44 = 8,300.24 : x
  2. Step 2: Convert to fraction form
    15,014.76/20,721.44 = 8,300.24/x
  3. Step 3: Cross multiply
    15,014.76x = 20,721.44 × 8,300.24
  4. Step 4: Simplify right side
    15,014.76x = 171,992,925.15
  5. Step 5: Solve for x
    x = 171,992,925.15/15,014.76
  6. Step 6: Final answer
    x = 11,454.92

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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.