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Finding the Fourth Proportional to 28,798.64, 39,749.54 and 18,752.16

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Solution

The fourth proportional to 28,798.64, 39,749.54 and 18,752.16 is: 25,882.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,798.64 : 39,749.54 = 18,752.16 : x
  2. Step 2: Convert to fraction form
    28,798.64/39,749.54 = 18,752.16/x
  3. Step 3: Cross multiply
    28,798.64x = 39,749.54 × 18,752.16
  4. Step 4: Simplify right side
    28,798.64x = 745,389,734.01
  5. Step 5: Solve for x
    x = 745,389,734.01/28,798.64
  6. Step 6: Final answer
    x = 25,882.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.