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Finding the Fourth Proportional to 28,009.98, 42,023.12 and 8,289.06

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Solution

The fourth proportional to 28,009.98, 42,023.12 and 8,289.06 is: 12,436.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,009.98 : 42,023.12 = 8,289.06 : x
  2. Step 2: Convert to fraction form
    28,009.98/42,023.12 = 8,289.06/x
  3. Step 3: Cross multiply
    28,009.98x = 42,023.12 × 8,289.06
  4. Step 4: Simplify right side
    28,009.98x = 348,332,163.07
  5. Step 5: Solve for x
    x = 348,332,163.07/28,009.98
  6. Step 6: Final answer
    x = 12,436.00

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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.