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Finding the Fourth Proportional to 28,230.46, 42,362.08 and 12,648.08

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Solution

The fourth proportional to 28,230.46, 42,362.08 and 12,648.08 is: 18,979.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,230.46 : 42,362.08 = 12,648.08 : x
  2. Step 2: Convert to fraction form
    28,230.46/42,362.08 = 12,648.08/x
  3. Step 3: Cross multiply
    28,230.46x = 42,362.08 × 12,648.08
  4. Step 4: Simplify right side
    28,230.46x = 535,798,976.81
  5. Step 5: Solve for x
    x = 535,798,976.81/28,230.46
  6. Step 6: Final answer
    x = 18,979.46

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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.