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Finding the Fourth Proportional to 28,065.92, 42,120.29 and 10,313.40

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Solution

The fourth proportional to 28,065.92, 42,120.29 and 10,313.40 is: 15,477.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,065.92 : 42,120.29 = 10,313.40 : x
  2. Step 2: Convert to fraction form
    28,065.92/42,120.29 = 10,313.40/x
  3. Step 3: Cross multiply
    28,065.92x = 42,120.29 × 10,313.40
  4. Step 4: Simplify right side
    28,065.92x = 434,403,189.37
  5. Step 5: Solve for x
    x = 434,403,189.37/28,065.92
  6. Step 6: Final answer
    x = 15,477.96

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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.