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Finding the Fourth Proportional to 28,010.59, 42,022.13 and 12,218.19

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Solution

The fourth proportional to 28,010.59, 42,022.13 and 12,218.19 is: 18,330.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,010.59 : 42,022.13 = 12,218.19 : x
  2. Step 2: Convert to fraction form
    28,010.59/42,022.13 = 12,218.19/x
  3. Step 3: Cross multiply
    28,010.59x = 42,022.13 × 12,218.19
  4. Step 4: Simplify right side
    28,010.59x = 513,434,368.54
  5. Step 5: Solve for x
    x = 513,434,368.54/28,010.59
  6. Step 6: Final answer
    x = 18,330.01

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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.