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Finding the Fourth Proportional to 15,054.75, 20,775.56 and 8,430.75

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Solution

The fourth proportional to 15,054.75, 20,775.56 and 8,430.75 is: 11,634.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,054.75 : 20,775.56 = 8,430.75 : x
  2. Step 2: Convert to fraction form
    15,054.75/20,775.56 = 8,430.75/x
  3. Step 3: Cross multiply
    15,054.75x = 20,775.56 × 8,430.75
  4. Step 4: Simplify right side
    15,054.75x = 175,153,510.32
  5. Step 5: Solve for x
    x = 175,153,510.32/15,054.75
  6. Step 6: Final answer
    x = 11,634.44

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Half scale
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Double scale
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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.