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Finding the Fourth Proportional to 15,978.57, 23,970.21 and 4,883.79

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Solution

The fourth proportional to 15,978.57, 23,970.21 and 4,883.79 is: 7,326.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,978.57 : 23,970.21 = 4,883.79 : x
  2. Step 2: Convert to fraction form
    15,978.57/23,970.21 = 4,883.79/x
  3. Step 3: Cross multiply
    15,978.57x = 23,970.21 × 4,883.79
  4. Step 4: Simplify right side
    15,978.57x = 117,065,471.90
  5. Step 5: Solve for x
    x = 117,065,471.90/15,978.57
  6. Step 6: Final answer
    x = 7,326.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.