Home / 28,342.40-42,513.60-10,812.80

Finding the Fourth Proportional to 28,342.40, 42,513.60 and 10,812.80

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Solution

The fourth proportional to 28,342.40, 42,513.60 and 10,812.80 is: 16,219.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,342.40 : 42,513.60 = 10,812.80 : x
  2. Step 2: Convert to fraction form
    28,342.40/42,513.60 = 10,812.80/x
  3. Step 3: Cross multiply
    28,342.40x = 42,513.60 × 10,812.80
  4. Step 4: Simplify right side
    28,342.40x = 459,691,054.08
  5. Step 5: Solve for x
    x = 459,691,054.08/28,342.40
  6. Step 6: Final answer
    x = 16,219.20

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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.